2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
35 #include "adt/strutil.h"
43 #include "diagnostic.h"
44 #include "lang_features.h"
46 #include "type_hash.h"
51 #include "entitymap_t.h"
52 #include "driver/firm_opt.h"
54 typedef struct trampoline_region trampoline_region;
55 struct trampoline_region {
56 ir_entity *function; /**< The function that is called by this trampoline */
57 ir_entity *region; /**< created region for the trampoline */
60 fp_model_t firm_fp_model = fp_model_precise;
62 static const backend_params *be_params;
64 static ir_type *ir_type_char;
65 static ir_type *ir_type_const_char;
66 static ir_type *ir_type_wchar_t;
67 static ir_type *ir_type_void;
68 static ir_type *ir_type_int;
70 /* architecture specific floating point arithmetic mode (if any) */
71 static ir_mode *mode_float_arithmetic;
73 /* alignment of stack parameters */
74 static unsigned stack_param_align;
76 static int next_value_number_function;
77 static ir_node *continue_label;
78 static ir_node *break_label;
79 static ir_node *current_switch_cond;
80 static bool saw_default_label;
81 static label_t **all_labels;
82 static entity_t **inner_functions;
83 static ir_node *ijmp_list;
84 static bool constant_folding;
86 static const entity_t *current_function_entity;
87 static ir_node *current_function_name;
88 static ir_node *current_funcsig;
89 static switch_statement_t *current_switch;
90 static ir_graph *current_function;
91 static translation_unit_t *current_translation_unit;
92 static trampoline_region *current_trampolines;
93 static ir_type *current_outer_frame;
94 static ir_node *current_static_link;
95 static ir_entity *current_vararg_entity;
97 static entitymap_t entitymap;
99 static struct obstack asm_obst;
101 typedef enum declaration_kind_t {
102 DECLARATION_KIND_UNKNOWN,
103 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
104 DECLARATION_KIND_GLOBAL_VARIABLE,
105 DECLARATION_KIND_LOCAL_VARIABLE,
106 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
107 DECLARATION_KIND_PARAMETER,
108 DECLARATION_KIND_PARAMETER_ENTITY,
109 DECLARATION_KIND_FUNCTION,
110 DECLARATION_KIND_COMPOUND_MEMBER,
111 DECLARATION_KIND_INNER_FUNCTION
112 } declaration_kind_t;
114 static ir_type *get_ir_type_incomplete(type_t *type);
116 static void enqueue_inner_function(entity_t *entity)
118 if (inner_functions == NULL)
119 inner_functions = NEW_ARR_F(entity_t *, 0);
120 ARR_APP1(entity_t*, inner_functions, entity);
123 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
125 const entity_t *entity = get_irg_loc_description(irg, pos);
127 if (entity != NULL) {
128 source_position_t const *const pos = &entity->base.source_position;
129 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
131 return new_r_Unknown(irg, mode);
134 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
136 const source_position_t *pos = (const source_position_t*) dbg;
141 return pos->input_name;
144 static dbg_info *get_dbg_info(const source_position_t *pos)
146 return (dbg_info*) pos;
149 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
150 const type_dbg_info *dbg)
153 print_to_buffer(buffer, buffer_size);
154 const type_t *type = (const type_t*) dbg;
156 finish_print_to_buffer();
159 static type_dbg_info *get_type_dbg_info_(const type_t *type)
161 return (type_dbg_info*) type;
164 /* is the current block a reachable one? */
165 static bool currently_reachable(void)
167 ir_node *const block = get_cur_block();
168 return block != NULL && !is_Bad(block);
171 static void set_unreachable_now(void)
176 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
178 static ir_node *_expression_to_firm(const expression_t *expression);
179 static ir_node *expression_to_firm(const expression_t *expression);
180 static void create_local_declaration(entity_t *entity);
182 static unsigned decide_modulo_shift(unsigned type_size)
184 if (architecture_modulo_shift == 0)
186 if (type_size < architecture_modulo_shift)
187 return architecture_modulo_shift;
191 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
193 unsigned flags = get_atomic_type_flags(kind);
194 unsigned size = get_atomic_type_size(kind);
195 if ((flags & ATOMIC_TYPE_FLAG_FLOAT)
196 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
199 } else if (size == 8) {
202 panic("unexpected kind");
204 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
206 unsigned bit_size = size * 8;
207 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
208 unsigned modulo_shift = decide_modulo_shift(bit_size);
210 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
211 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
219 * Initialises the atomic modes depending on the machine size.
221 static void init_atomic_modes(void)
223 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
224 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
225 if (atomic_modes[i] != NULL)
227 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
231 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
233 assert(kind <= ATOMIC_TYPE_LAST);
234 return atomic_modes[kind];
237 static ir_node *get_vla_size(array_type_t *const type)
239 ir_node *size_node = type->size_node;
240 if (size_node == NULL) {
241 size_node = expression_to_firm(type->size_expression);
242 type->size_node = size_node;
247 static unsigned count_parameters(const function_type_t *function_type)
251 function_parameter_t *parameter = function_type->parameters;
252 for ( ; parameter != NULL; parameter = parameter->next) {
260 * Creates a Firm type for an atomic type
262 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
264 ir_mode *mode = atomic_modes[akind];
265 type_dbg_info *dbgi = get_type_dbg_info_(type);
266 ir_type *irtype = new_d_type_primitive(mode, dbgi);
267 il_alignment_t alignment = get_atomic_type_alignment(akind);
269 set_type_size_bytes(irtype, get_atomic_type_size(akind));
270 set_type_alignment_bytes(irtype, alignment);
276 * Creates a Firm type for a complex type
278 static ir_type *create_complex_type(const atomic_type_t *type)
280 atomic_type_kind_t kind = type->akind;
281 ir_mode *mode = atomic_modes[kind];
282 ident *id = get_mode_ident(mode);
286 /* FIXME: finish the array */
291 * Creates a Firm type for an imaginary type
293 static ir_type *create_imaginary_type(const atomic_type_t *type)
295 return create_atomic_type(type->akind, (const type_t*)type);
299 * return type of a parameter (and take transparent union gnu extension into
302 static type_t *get_parameter_type(type_t *orig_type)
304 type_t *type = skip_typeref(orig_type);
305 if (is_type_union(type)
306 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
307 compound_t *compound = type->compound.compound;
308 type = compound->members.entities->declaration.type;
314 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
316 type_t *return_type = skip_typeref(function_type->return_type);
318 int n_parameters = count_parameters(function_type)
319 + (for_closure ? 1 : 0);
320 int n_results = return_type == type_void ? 0 : 1;
321 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
322 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
324 if (return_type != type_void) {
325 ir_type *restype = get_ir_type(return_type);
326 set_method_res_type(irtype, 0, restype);
329 function_parameter_t *parameter = function_type->parameters;
332 ir_type *p_irtype = get_ir_type(type_void_ptr);
333 set_method_param_type(irtype, n, p_irtype);
336 for ( ; parameter != NULL; parameter = parameter->next) {
337 type_t *type = get_parameter_type(parameter->type);
338 ir_type *p_irtype = get_ir_type(type);
339 set_method_param_type(irtype, n, p_irtype);
343 bool is_variadic = function_type->variadic;
346 set_method_variadicity(irtype, variadicity_variadic);
348 unsigned cc = get_method_calling_convention(irtype);
349 switch (function_type->calling_convention) {
350 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
353 set_method_calling_convention(irtype, SET_CDECL(cc));
360 /* only non-variadic function can use stdcall, else use cdecl */
361 set_method_calling_convention(irtype, SET_STDCALL(cc));
367 /* only non-variadic function can use fastcall, else use cdecl */
368 set_method_calling_convention(irtype, SET_FASTCALL(cc));
372 /* Hmm, leave default, not accepted by the parser yet. */
377 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
379 const decl_modifiers_t modifiers = function_type->modifiers;
380 if (modifiers & DM_CONST)
381 add_method_additional_properties(irtype, mtp_property_const);
382 if (modifiers & DM_PURE)
383 add_method_additional_properties(irtype, mtp_property_pure);
384 if (modifiers & DM_RETURNS_TWICE)
385 add_method_additional_properties(irtype, mtp_property_returns_twice);
386 if (modifiers & DM_NORETURN)
387 add_method_additional_properties(irtype, mtp_property_noreturn);
388 if (modifiers & DM_NOTHROW)
389 add_method_additional_properties(irtype, mtp_property_nothrow);
390 if (modifiers & DM_MALLOC)
391 add_method_additional_properties(irtype, mtp_property_malloc);
396 static ir_type *create_pointer_type(pointer_type_t *type)
398 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
399 type_t *points_to = type->points_to;
400 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
401 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
406 static ir_type *create_reference_type(reference_type_t *type)
408 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
409 type_t *refers_to = type->refers_to;
410 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
411 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
416 static ir_type *create_array_type(array_type_t *type)
418 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
419 type_t *element_type = type->element_type;
420 ir_type *ir_element_type = get_ir_type(element_type);
421 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
423 const int align = get_type_alignment_bytes(ir_element_type);
424 set_type_alignment_bytes(irtype, align);
426 if (type->size_constant) {
427 int n_elements = type->size;
429 set_array_bounds_int(irtype, 0, 0, n_elements);
431 size_t elemsize = get_type_size_bytes(ir_element_type);
432 if (elemsize % align > 0) {
433 elemsize += align - (elemsize % align);
435 set_type_size_bytes(irtype, n_elements * elemsize);
437 set_array_lower_bound_int(irtype, 0, 0);
439 set_type_state(irtype, layout_fixed);
445 * Return the signed integer type of size bits.
447 * @param size the size
449 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
453 static ir_mode *s_modes[64 + 1] = {NULL, };
457 if (size <= 0 || size > 64)
460 mode = s_modes[size];
464 snprintf(name, sizeof(name), "bf_I%u", size);
465 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
466 s_modes[size] = mode;
469 type_dbg_info *dbgi = get_type_dbg_info_(type);
470 res = new_d_type_primitive(mode, dbgi);
471 set_primitive_base_type(res, base_tp);
477 * Return the unsigned integer type of size bits.
479 * @param size the size
481 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
485 static ir_mode *u_modes[64 + 1] = {NULL, };
489 if (size <= 0 || size > 64)
492 mode = u_modes[size];
496 snprintf(name, sizeof(name), "bf_U%u", size);
497 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
498 u_modes[size] = mode;
501 type_dbg_info *dbgi = get_type_dbg_info_(type);
502 res = new_d_type_primitive(mode, dbgi);
503 set_primitive_base_type(res, base_tp);
508 static ir_type *create_bitfield_type(const entity_t *entity)
510 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
511 type_t *base = skip_typeref(entity->declaration.type);
512 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
513 ir_type *irbase = get_ir_type(base);
515 unsigned bit_size = entity->compound_member.bit_size;
517 assert(!is_type_float(base));
518 if (is_type_signed(base)) {
519 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
521 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
525 #define INVALID_TYPE ((ir_type_ptr)-1)
528 COMPOUND_IS_STRUCT = false,
529 COMPOUND_IS_UNION = true
533 * Construct firm type from ast struct type.
535 static ir_type *create_compound_type(compound_type_t *type,
536 bool incomplete, bool is_union)
538 compound_t *compound = type->compound;
540 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
541 return compound->irtype;
544 symbol_t *type_symbol = compound->base.symbol;
546 if (type_symbol != NULL) {
547 id = new_id_from_str(type_symbol->string);
550 id = id_unique("__anonymous_union.%u");
552 id = id_unique("__anonymous_struct.%u");
558 irtype = new_type_union(id);
560 irtype = new_type_struct(id);
563 compound->irtype_complete = false;
564 compound->irtype = irtype;
570 layout_union_type(type);
572 layout_struct_type(type);
575 compound->irtype_complete = true;
577 entity_t *entry = compound->members.entities;
578 for ( ; entry != NULL; entry = entry->base.next) {
579 if (entry->kind != ENTITY_COMPOUND_MEMBER)
582 symbol_t *symbol = entry->base.symbol;
583 type_t *entry_type = entry->declaration.type;
585 if (symbol == NULL) {
586 /* anonymous bitfield member, skip */
587 if (entry->compound_member.bitfield)
589 assert(entry_type->kind == TYPE_COMPOUND_STRUCT
590 || entry_type->kind == TYPE_COMPOUND_UNION);
591 ident = id_unique("anon.%u");
593 ident = new_id_from_str(symbol->string);
596 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
598 ir_type *entry_irtype;
599 if (entry->compound_member.bitfield) {
600 entry_irtype = create_bitfield_type(entry);
602 entry_irtype = get_ir_type(entry_type);
604 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
606 set_entity_offset(entity, entry->compound_member.offset);
607 set_entity_offset_bits_remainder(entity,
608 entry->compound_member.bit_offset);
610 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
611 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
612 entry->compound_member.entity = entity;
615 set_type_alignment_bytes(irtype, compound->alignment);
616 set_type_size_bytes(irtype, compound->size);
617 set_type_state(irtype, layout_fixed);
622 static void determine_enum_values(enum_type_t *const type)
624 ir_mode *const mode = atomic_modes[type->base.akind];
625 ir_tarval *const one = get_mode_one(mode);
626 ir_tarval * tv_next = get_mode_null(mode);
628 bool constant_folding_old = constant_folding;
629 constant_folding = true;
631 enum_t *enume = type->enume;
632 entity_t *entry = enume->base.next;
633 for (; entry != NULL; entry = entry->base.next) {
634 if (entry->kind != ENTITY_ENUM_VALUE)
637 expression_t *const init = entry->enum_value.value;
639 ir_node *const cnst = expression_to_firm(init);
640 if (!is_Const(cnst)) {
641 panic("couldn't fold constant");
643 tv_next = get_Const_tarval(cnst);
645 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
646 entry->enum_value.tv = tv_next;
647 tv_next = tarval_add(tv_next, one);
650 constant_folding = constant_folding_old;
653 static ir_type *create_enum_type(enum_type_t *const type)
655 return create_atomic_type(type->base.akind, (const type_t*) type);
658 static ir_type *get_ir_type_incomplete(type_t *type)
660 assert(type != NULL);
661 type = skip_typeref(type);
663 if (type->base.firm_type != NULL) {
664 assert(type->base.firm_type != INVALID_TYPE);
665 return type->base.firm_type;
668 switch (type->kind) {
669 case TYPE_COMPOUND_STRUCT:
670 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
671 case TYPE_COMPOUND_UNION:
672 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
674 return get_ir_type(type);
678 ir_type *get_ir_type(type_t *type)
680 assert(type != NULL);
682 type = skip_typeref(type);
684 if (type->base.firm_type != NULL) {
685 assert(type->base.firm_type != INVALID_TYPE);
686 return type->base.firm_type;
689 ir_type *firm_type = NULL;
690 switch (type->kind) {
692 /* Happens while constant folding, when there was an error */
693 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
696 firm_type = create_atomic_type(type->atomic.akind, type);
699 firm_type = create_complex_type(&type->atomic);
702 firm_type = create_imaginary_type(&type->atomic);
705 firm_type = create_method_type(&type->function, false);
708 firm_type = create_pointer_type(&type->pointer);
711 firm_type = create_reference_type(&type->reference);
714 firm_type = create_array_type(&type->array);
716 case TYPE_COMPOUND_STRUCT:
717 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
719 case TYPE_COMPOUND_UNION:
720 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
723 firm_type = create_enum_type(&type->enumt);
730 if (firm_type == NULL)
731 panic("unknown type found");
733 type->base.firm_type = firm_type;
737 static ir_mode *get_ir_mode_storage(type_t *type)
739 ir_type *irtype = get_ir_type(type);
741 /* firm doesn't report a mode for arrays somehow... */
742 if (is_Array_type(irtype)) {
746 ir_mode *mode = get_type_mode(irtype);
747 assert(mode != NULL);
752 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
753 * int that it returns bigger modes for floating point on some platforms
754 * (x87 internally does arithemtic with 80bits)
756 static ir_mode *get_ir_mode_arithmetic(type_t *type)
758 ir_mode *mode = get_ir_mode_storage(type);
759 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
760 return mode_float_arithmetic;
767 * Return a node representing the size of a type.
769 static ir_node *get_type_size_node(type_t *type)
772 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
773 type = skip_typeref(type);
775 if (is_type_array(type) && type->array.is_vla) {
776 ir_node *size_node = get_vla_size(&type->array);
777 ir_node *elem_size = get_type_size_node(type->array.element_type);
778 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
782 size = get_type_size(type);
783 return new_Const_long(mode, size);
786 /** Names of the runtime functions. */
787 static const struct {
788 int id; /**< the rts id */
789 int n_res; /**< number of return values */
790 const char *name; /**< the name of the rts function */
791 int n_params; /**< number of parameters */
792 unsigned flags; /**< language flags */
794 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
795 { rts_abort, 0, "abort", 0, _C89 },
796 { rts_alloca, 1, "alloca", 1, _ALL },
797 { rts_abs, 1, "abs", 1, _C89 },
798 { rts_labs, 1, "labs", 1, _C89 },
799 { rts_llabs, 1, "llabs", 1, _C99 },
800 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
802 { rts_fabs, 1, "fabs", 1, _C89 },
803 { rts_sqrt, 1, "sqrt", 1, _C89 },
804 { rts_cbrt, 1, "cbrt", 1, _C99 },
805 { rts_exp, 1, "exp", 1, _C89 },
806 { rts_exp2, 1, "exp2", 1, _C89 },
807 { rts_exp10, 1, "exp10", 1, _GNUC },
808 { rts_log, 1, "log", 1, _C89 },
809 { rts_log2, 1, "log2", 1, _C89 },
810 { rts_log10, 1, "log10", 1, _C89 },
811 { rts_pow, 1, "pow", 2, _C89 },
812 { rts_sin, 1, "sin", 1, _C89 },
813 { rts_cos, 1, "cos", 1, _C89 },
814 { rts_tan, 1, "tan", 1, _C89 },
815 { rts_asin, 1, "asin", 1, _C89 },
816 { rts_acos, 1, "acos", 1, _C89 },
817 { rts_atan, 1, "atan", 1, _C89 },
818 { rts_sinh, 1, "sinh", 1, _C89 },
819 { rts_cosh, 1, "cosh", 1, _C89 },
820 { rts_tanh, 1, "tanh", 1, _C89 },
822 { rts_fabsf, 1, "fabsf", 1, _C99 },
823 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
824 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
825 { rts_expf, 1, "expf", 1, _C99 },
826 { rts_exp2f, 1, "exp2f", 1, _C99 },
827 { rts_exp10f, 1, "exp10f", 1, _GNUC },
828 { rts_logf, 1, "logf", 1, _C99 },
829 { rts_log2f, 1, "log2f", 1, _C99 },
830 { rts_log10f, 1, "log10f", 1, _C99 },
831 { rts_powf, 1, "powf", 2, _C99 },
832 { rts_sinf, 1, "sinf", 1, _C99 },
833 { rts_cosf, 1, "cosf", 1, _C99 },
834 { rts_tanf, 1, "tanf", 1, _C99 },
835 { rts_asinf, 1, "asinf", 1, _C99 },
836 { rts_acosf, 1, "acosf", 1, _C99 },
837 { rts_atanf, 1, "atanf", 1, _C99 },
838 { rts_sinhf, 1, "sinhf", 1, _C99 },
839 { rts_coshf, 1, "coshf", 1, _C99 },
840 { rts_tanhf, 1, "tanhf", 1, _C99 },
842 { rts_fabsl, 1, "fabsl", 1, _C99 },
843 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
844 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
845 { rts_expl, 1, "expl", 1, _C99 },
846 { rts_exp2l, 1, "exp2l", 1, _C99 },
847 { rts_exp10l, 1, "exp10l", 1, _GNUC },
848 { rts_logl, 1, "logl", 1, _C99 },
849 { rts_log2l, 1, "log2l", 1, _C99 },
850 { rts_log10l, 1, "log10l", 1, _C99 },
851 { rts_powl, 1, "powl", 2, _C99 },
852 { rts_sinl, 1, "sinl", 1, _C99 },
853 { rts_cosl, 1, "cosl", 1, _C99 },
854 { rts_tanl, 1, "tanl", 1, _C99 },
855 { rts_asinl, 1, "asinl", 1, _C99 },
856 { rts_acosl, 1, "acosl", 1, _C99 },
857 { rts_atanl, 1, "atanl", 1, _C99 },
858 { rts_sinhl, 1, "sinhl", 1, _C99 },
859 { rts_coshl, 1, "coshl", 1, _C99 },
860 { rts_tanhl, 1, "tanhl", 1, _C99 },
862 { rts_strcmp, 1, "strcmp", 2, _C89 },
863 { rts_strncmp, 1, "strncmp", 3, _C89 },
864 { rts_strcpy, 1, "strcpy", 2, _C89 },
865 { rts_strlen, 1, "strlen", 1, _C89 },
866 { rts_memcpy, 1, "memcpy", 3, _C89 },
867 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
868 { rts_memmove, 1, "memmove", 3, _C89 },
869 { rts_memset, 1, "memset", 3, _C89 },
870 { rts_memcmp, 1, "memcmp", 3, _C89 },
873 static ident *rts_idents[lengthof(rts_data)];
875 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
877 void set_create_ld_ident(ident *(*func)(entity_t*))
879 create_ld_ident = func;
883 * Handle GNU attributes for entities
885 * @param ent the entity
886 * @param decl the routine declaration
888 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
890 assert(is_declaration(entity));
891 decl_modifiers_t modifiers = entity->declaration.modifiers;
893 if (is_method_entity(irentity)) {
894 if (modifiers & DM_PURE) {
895 set_entity_additional_properties(irentity, mtp_property_pure);
897 if (modifiers & DM_CONST) {
898 add_entity_additional_properties(irentity, mtp_property_const);
901 if (modifiers & DM_USED) {
902 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
904 if (modifiers & DM_WEAK) {
905 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
909 static bool is_main(entity_t *entity)
911 static symbol_t *sym_main = NULL;
912 if (sym_main == NULL) {
913 sym_main = symbol_table_insert("main");
916 if (entity->base.symbol != sym_main)
918 /* must be in outermost scope */
919 if (entity->base.parent_scope != ¤t_translation_unit->scope)
926 * Creates an entity representing a function.
928 * @param entity the function declaration/definition
929 * @param owner_type the owner type of this function, NULL
930 * for global functions
932 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
934 assert(entity->kind == ENTITY_FUNCTION);
935 if (entity->function.irentity != NULL)
936 return entity->function.irentity;
938 switch (entity->function.btk) {
941 case BUILTIN_LIBC_CHECK:
947 if (is_main(entity)) {
948 /* force main to C linkage */
949 type_t *type = entity->declaration.type;
950 assert(is_type_function(type));
951 if (type->function.linkage != LINKAGE_C) {
952 type_t *new_type = duplicate_type(type);
953 new_type->function.linkage = LINKAGE_C;
954 type = identify_new_type(new_type);
955 entity->declaration.type = type;
959 symbol_t *symbol = entity->base.symbol;
960 ident *id = new_id_from_str(symbol->string);
962 /* already an entity defined? */
963 ir_entity *irentity = entitymap_get(&entitymap, symbol);
964 bool const has_body = entity->function.statement != NULL;
965 if (irentity != NULL) {
966 if (get_entity_visibility(irentity) == ir_visibility_external
968 set_entity_visibility(irentity, ir_visibility_default);
973 ir_type *ir_type_method;
974 if (entity->function.need_closure)
975 ir_type_method = create_method_type(&entity->declaration.type->function, true);
977 ir_type_method = get_ir_type(entity->declaration.type);
979 bool nested_function = false;
980 if (owner_type == NULL)
981 owner_type = get_glob_type();
983 nested_function = true;
985 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
986 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
990 ld_id = id_unique("inner.%u");
992 ld_id = create_ld_ident(entity);
993 set_entity_ld_ident(irentity, ld_id);
995 handle_decl_modifiers(irentity, entity);
997 if (! nested_function) {
998 /* static inline => local
999 * extern inline => local
1000 * inline without definition => local
1001 * inline with definition => external_visible */
1002 storage_class_tag_t const storage_class
1003 = (storage_class_tag_t) entity->declaration.storage_class;
1004 bool const is_inline = entity->function.is_inline;
1006 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1007 set_entity_visibility(irentity, ir_visibility_default);
1008 } else if (storage_class == STORAGE_CLASS_STATIC ||
1009 (is_inline && has_body)) {
1010 set_entity_visibility(irentity, ir_visibility_local);
1011 } else if (has_body) {
1012 set_entity_visibility(irentity, ir_visibility_default);
1014 set_entity_visibility(irentity, ir_visibility_external);
1017 /* nested functions are always local */
1018 set_entity_visibility(irentity, ir_visibility_local);
1021 /* We should check for file scope here, but as long as we compile C only
1022 this is not needed. */
1023 if (!freestanding && !has_body) {
1024 /* check for a known runtime function */
1025 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1026 if (id != rts_idents[i])
1029 function_type_t *function_type
1030 = &entity->declaration.type->function;
1031 /* rts_entities code can't handle a "wrong" number of parameters */
1032 if (function_type->unspecified_parameters)
1035 /* check number of parameters */
1036 int n_params = count_parameters(function_type);
1037 if (n_params != rts_data[i].n_params)
1040 type_t *return_type = skip_typeref(function_type->return_type);
1041 int n_res = return_type != type_void ? 1 : 0;
1042 if (n_res != rts_data[i].n_res)
1045 /* ignore those rts functions not necessary needed for current mode */
1046 if ((c_mode & rts_data[i].flags) == 0)
1048 assert(rts_entities[rts_data[i].id] == NULL);
1049 rts_entities[rts_data[i].id] = irentity;
1053 entitymap_insert(&entitymap, symbol, irentity);
1056 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1057 entity->function.irentity = irentity;
1063 * Creates a SymConst for a given entity.
1065 * @param dbgi debug info
1066 * @param entity the entity
1068 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1070 assert(entity != NULL);
1071 union symconst_symbol sym;
1072 sym.entity_p = entity;
1073 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1076 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1078 ir_mode *value_mode = get_irn_mode(value);
1080 if (value_mode == dest_mode)
1083 if (dest_mode == mode_b) {
1084 ir_node *zero = new_Const(get_mode_null(value_mode));
1085 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_less_greater);
1089 return new_d_Conv(dbgi, value, dest_mode);
1092 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1094 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1098 * Creates a SymConst node representing a wide string literal.
1100 * @param literal the wide string literal
1102 static ir_node *wide_string_literal_to_firm(
1103 const string_literal_expression_t *literal)
1105 ir_type *const global_type = get_glob_type();
1106 ir_type *const elem_type = ir_type_wchar_t;
1107 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1108 ir_type *const type = new_type_array(1, elem_type);
1110 ident *const id = id_unique("str.%u");
1111 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1112 set_entity_ld_ident(entity, id);
1113 set_entity_visibility(entity, ir_visibility_private);
1114 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1116 ir_mode *const mode = get_type_mode(elem_type);
1117 const size_t slen = wstrlen(&literal->value);
1119 set_array_lower_bound_int(type, 0, 0);
1120 set_array_upper_bound_int(type, 0, slen);
1121 set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1122 set_type_state(type, layout_fixed);
1124 ir_initializer_t *initializer = create_initializer_compound(slen);
1125 const char *p = literal->value.begin;
1126 for (size_t i = 0; i < slen; ++i) {
1127 assert(p < literal->value.begin + literal->value.size);
1128 utf32 v = read_utf8_char(&p);
1129 ir_tarval *tv = new_tarval_from_long(v, mode);
1130 ir_initializer_t *val = create_initializer_tarval(tv);
1131 set_initializer_compound_value(initializer, i, val);
1133 set_entity_initializer(entity, initializer);
1135 return create_symconst(dbgi, entity);
1139 * Creates a SymConst node representing a string constant.
1141 * @param src_pos the source position of the string constant
1142 * @param id_prefix a prefix for the name of the generated string constant
1143 * @param value the value of the string constant
1145 static ir_node *string_to_firm(const source_position_t *const src_pos,
1146 const char *const id_prefix,
1147 const string_t *const value)
1149 ir_type *const global_type = get_glob_type();
1150 dbg_info *const dbgi = get_dbg_info(src_pos);
1151 ir_type *const type = new_type_array(1, ir_type_const_char);
1153 ident *const id = id_unique(id_prefix);
1154 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1155 set_entity_ld_ident(entity, id);
1156 set_entity_visibility(entity, ir_visibility_private);
1157 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1159 ir_type *const elem_type = ir_type_const_char;
1160 ir_mode *const mode = get_type_mode(elem_type);
1162 const char* const string = value->begin;
1163 const size_t slen = value->size;
1165 set_array_lower_bound_int(type, 0, 0);
1166 set_array_upper_bound_int(type, 0, slen);
1167 set_type_size_bytes(type, slen);
1168 set_type_state(type, layout_fixed);
1170 ir_initializer_t *initializer = create_initializer_compound(slen);
1171 for (size_t i = 0; i < slen; ++i) {
1172 ir_tarval *tv = new_tarval_from_long(string[i], mode);
1173 ir_initializer_t *val = create_initializer_tarval(tv);
1174 set_initializer_compound_value(initializer, i, val);
1176 set_entity_initializer(entity, initializer);
1178 return create_symconst(dbgi, entity);
1181 static bool try_create_integer(literal_expression_t *literal,
1182 type_t *type, unsigned char base)
1184 const char *string = literal->value.begin;
1185 size_t size = literal->value.size;
1187 assert(type->kind == TYPE_ATOMIC);
1188 atomic_type_kind_t akind = type->atomic.akind;
1190 ir_mode *mode = atomic_modes[akind];
1191 ir_tarval *tv = new_integer_tarval_from_str(string, size, 1, base, mode);
1192 if (tv == tarval_bad)
1195 literal->base.type = type;
1196 literal->target_value = tv;
1200 static void create_integer_tarval(literal_expression_t *literal)
1204 const string_t *suffix = &literal->suffix;
1206 if (suffix->size > 0) {
1207 for (const char *c = suffix->begin; *c != '\0'; ++c) {
1208 if (*c == 'u' || *c == 'U') { ++us; }
1209 if (*c == 'l' || *c == 'L') { ++ls; }
1214 switch (literal->base.kind) {
1215 case EXPR_LITERAL_INTEGER_OCTAL: base = 8; break;
1216 case EXPR_LITERAL_INTEGER: base = 10; break;
1217 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1218 default: panic("invalid literal kind");
1221 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1223 /* now try if the constant is small enough for some types */
1224 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1226 if (us == 0 && try_create_integer(literal, type_int, base))
1228 if ((us == 1 || base != 10)
1229 && try_create_integer(literal, type_unsigned_int, base))
1233 if (us == 0 && try_create_integer(literal, type_long, base))
1235 if ((us == 1 || base != 10)
1236 && try_create_integer(literal, type_unsigned_long, base))
1239 /* last try? then we should not report tarval_bad */
1240 if (us != 1 && base == 10)
1241 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1242 if (us == 0 && try_create_integer(literal, type_long_long, base))
1246 assert(us == 1 || base != 10);
1247 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1248 bool res = try_create_integer(literal, type_unsigned_long_long, base);
1250 panic("internal error when parsing number literal");
1253 tarval_set_integer_overflow_mode(old_mode);
1256 void determine_literal_type(literal_expression_t *literal)
1258 switch (literal->base.kind) {
1259 case EXPR_LITERAL_INTEGER:
1260 case EXPR_LITERAL_INTEGER_OCTAL:
1261 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1262 create_integer_tarval(literal);
1270 * Creates a Const node representing a constant.
1272 static ir_node *literal_to_firm(const literal_expression_t *literal)
1274 type_t *type = skip_typeref(literal->base.type);
1275 ir_mode *mode = get_ir_mode_storage(type);
1276 const char *string = literal->value.begin;
1277 size_t size = literal->value.size;
1280 switch (literal->base.kind) {
1281 case EXPR_LITERAL_WIDE_CHARACTER: {
1282 utf32 v = read_utf8_char(&string);
1284 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1286 tv = new_tarval_from_str(buf, len, mode);
1289 case EXPR_LITERAL_CHARACTER: {
1292 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1293 if (size == 1 && char_is_signed) {
1294 v = (signed char)string[0];
1297 for (size_t i = 0; i < size; ++i) {
1298 v = (v << 8) | ((unsigned char)string[i]);
1302 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1304 tv = new_tarval_from_str(buf, len, mode);
1307 case EXPR_LITERAL_INTEGER:
1308 case EXPR_LITERAL_INTEGER_OCTAL:
1309 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1310 assert(literal->target_value != NULL);
1311 tv = literal->target_value;
1313 case EXPR_LITERAL_FLOATINGPOINT:
1314 tv = new_tarval_from_str(string, size, mode);
1316 case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1317 char buffer[size + 2];
1318 memcpy(buffer, "0x", 2);
1319 memcpy(buffer+2, string, size);
1320 tv = new_tarval_from_str(buffer, size+2, mode);
1323 case EXPR_LITERAL_BOOLEAN:
1324 if (string[0] == 't') {
1325 tv = get_mode_one(mode);
1327 assert(string[0] == 'f');
1328 tv = get_mode_null(mode);
1331 case EXPR_LITERAL_MS_NOOP:
1332 tv = get_mode_null(mode);
1337 panic("Invalid literal kind found");
1340 dbg_info *dbgi = get_dbg_info(&literal->base.source_position);
1341 ir_node *res = new_d_Const(dbgi, tv);
1342 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1343 return create_conv(dbgi, res, mode_arith);
1347 * Allocate an area of size bytes aligned at alignment
1350 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1352 static unsigned area_cnt = 0;
1355 ir_type *tp = new_type_array(1, ir_type_char);
1356 set_array_bounds_int(tp, 0, 0, size);
1357 set_type_alignment_bytes(tp, alignment);
1359 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1360 ident *name = new_id_from_str(buf);
1361 ir_entity *area = new_entity(frame_type, name, tp);
1363 /* mark this entity as compiler generated */
1364 set_entity_compiler_generated(area, 1);
1369 * Return a node representing a trampoline region
1370 * for a given function entity.
1372 * @param dbgi debug info
1373 * @param entity the function entity
1375 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1377 ir_entity *region = NULL;
1380 if (current_trampolines != NULL) {
1381 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1382 if (current_trampolines[i].function == entity) {
1383 region = current_trampolines[i].region;
1388 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1390 ir_graph *irg = current_ir_graph;
1391 if (region == NULL) {
1392 /* create a new region */
1393 ir_type *frame_tp = get_irg_frame_type(irg);
1394 trampoline_region reg;
1395 reg.function = entity;
1397 reg.region = alloc_trampoline(frame_tp,
1398 be_params->trampoline_size,
1399 be_params->trampoline_align);
1400 ARR_APP1(trampoline_region, current_trampolines, reg);
1401 region = reg.region;
1403 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1408 * Creates a trampoline for a function represented by an entity.
1410 * @param dbgi debug info
1411 * @param mode the (reference) mode for the function address
1412 * @param entity the function entity
1414 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1417 assert(entity != NULL);
1419 in[0] = get_trampoline_region(dbgi, entity);
1420 in[1] = create_symconst(dbgi, entity);
1421 in[2] = get_irg_frame(current_ir_graph);
1423 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1424 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1425 return new_Proj(irn, mode, pn_Builtin_1_result);
1429 * Dereference an address.
1431 * @param dbgi debug info
1432 * @param type the type of the dereferenced result (the points_to type)
1433 * @param addr the address to dereference
1435 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1436 ir_node *const addr)
1438 type_t *skipped = skip_typeref(type);
1439 if (is_type_incomplete(skipped))
1442 ir_type *irtype = get_ir_type(skipped);
1443 if (is_compound_type(irtype)
1444 || is_Method_type(irtype)
1445 || is_Array_type(irtype)) {
1449 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1450 ? cons_volatile : cons_none;
1451 ir_mode *const mode = get_type_mode(irtype);
1452 ir_node *const memory = get_store();
1453 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1454 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1455 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1457 set_store(load_mem);
1459 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1460 return create_conv(dbgi, load_res, mode_arithmetic);
1464 * Creates a strict Conv (to the node's mode) if necessary.
1466 * @param dbgi debug info
1467 * @param node the node to strict conv
1469 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1471 ir_mode *mode = get_irn_mode(node);
1473 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1475 if (!mode_is_float(mode))
1478 /* check if there is already a Conv */
1479 if (is_Conv(node)) {
1480 /* convert it into a strict Conv */
1481 set_Conv_strict(node, 1);
1485 /* otherwise create a new one */
1486 return new_d_strictConv(dbgi, node, mode);
1490 * Returns the correct base address depending on whether it is a parameter or a
1491 * normal local variable.
1493 static ir_node *get_local_frame(ir_entity *const ent)
1495 ir_graph *const irg = current_ir_graph;
1496 const ir_type *const owner = get_entity_owner(ent);
1497 if (owner == current_outer_frame) {
1498 assert(current_static_link != NULL);
1499 return current_static_link;
1501 return get_irg_frame(irg);
1506 * Keep all memory edges of the given block.
1508 static void keep_all_memory(ir_node *block)
1510 ir_node *old = get_cur_block();
1512 set_cur_block(block);
1513 keep_alive(get_store());
1514 /* TODO: keep all memory edges from restricted pointers */
1518 static ir_node *reference_expression_enum_value_to_firm(
1519 const reference_expression_t *ref)
1521 entity_t *entity = ref->entity;
1522 if (entity->enum_value.tv == NULL) {
1523 type_t *type = skip_typeref(entity->enum_value.enum_type);
1524 assert(type->kind == TYPE_ENUM);
1525 determine_enum_values(&type->enumt);
1528 return new_Const(entity->enum_value.tv);
1531 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1533 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1534 entity_t *entity = ref->entity;
1535 assert(is_declaration(entity));
1536 type_t *type = skip_typeref(entity->declaration.type);
1538 /* make sure the type is constructed */
1539 (void) get_ir_type(type);
1541 if (entity->kind == ENTITY_FUNCTION
1542 && entity->function.btk != BUILTIN_NONE) {
1543 ir_entity *irentity = get_function_entity(entity, NULL);
1544 /* for gcc compatibility we have to produce (dummy) addresses for some
1545 * builtins which don't have entities */
1546 if (irentity == NULL) {
1547 source_position_t const *const pos = &ref->base.source_position;
1548 symbol_t const *const sym = ref->entity->base.symbol;
1549 warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1551 /* simply create a NULL pointer */
1552 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1553 ir_node *res = new_Const(get_mode_null(mode));
1559 switch ((declaration_kind_t) entity->declaration.kind) {
1560 case DECLARATION_KIND_UNKNOWN:
1563 case DECLARATION_KIND_LOCAL_VARIABLE: {
1564 ir_mode *const mode = get_ir_mode_storage(type);
1565 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1566 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1568 case DECLARATION_KIND_PARAMETER: {
1569 ir_mode *const mode = get_ir_mode_storage(type);
1570 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1571 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1573 case DECLARATION_KIND_FUNCTION: {
1574 return create_symconst(dbgi, entity->function.irentity);
1576 case DECLARATION_KIND_INNER_FUNCTION: {
1577 ir_mode *const mode = get_ir_mode_storage(type);
1578 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1579 /* inner function not using the closure */
1580 return create_symconst(dbgi, entity->function.irentity);
1582 /* need trampoline here */
1583 return create_trampoline(dbgi, mode, entity->function.irentity);
1586 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1587 const variable_t *variable = &entity->variable;
1588 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1589 return deref_address(dbgi, variable->base.type, addr);
1592 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1593 ir_entity *irentity = entity->variable.v.entity;
1594 ir_node *frame = get_local_frame(irentity);
1595 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1596 return deref_address(dbgi, entity->declaration.type, sel);
1598 case DECLARATION_KIND_PARAMETER_ENTITY: {
1599 ir_entity *irentity = entity->parameter.v.entity;
1600 ir_node *frame = get_local_frame(irentity);
1601 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1602 return deref_address(dbgi, entity->declaration.type, sel);
1605 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1606 return entity->variable.v.vla_base;
1608 case DECLARATION_KIND_COMPOUND_MEMBER:
1609 panic("not implemented reference type");
1612 panic("reference to declaration with unknown type found");
1615 static ir_node *reference_addr(const reference_expression_t *ref)
1617 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1618 entity_t *entity = ref->entity;
1619 assert(is_declaration(entity));
1621 switch((declaration_kind_t) entity->declaration.kind) {
1622 case DECLARATION_KIND_UNKNOWN:
1624 case DECLARATION_KIND_PARAMETER:
1625 case DECLARATION_KIND_LOCAL_VARIABLE:
1626 /* you can store to a local variable (so we don't panic but return NULL
1627 * as an indicator for no real address) */
1629 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1630 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1633 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1634 ir_entity *irentity = entity->variable.v.entity;
1635 ir_node *frame = get_local_frame(irentity);
1636 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1640 case DECLARATION_KIND_PARAMETER_ENTITY: {
1641 ir_entity *irentity = entity->parameter.v.entity;
1642 ir_node *frame = get_local_frame(irentity);
1643 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1648 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1649 return entity->variable.v.vla_base;
1651 case DECLARATION_KIND_FUNCTION: {
1652 return create_symconst(dbgi, entity->function.irentity);
1655 case DECLARATION_KIND_INNER_FUNCTION: {
1656 type_t *const type = skip_typeref(entity->declaration.type);
1657 ir_mode *const mode = get_ir_mode_storage(type);
1658 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1659 /* inner function not using the closure */
1660 return create_symconst(dbgi, entity->function.irentity);
1662 /* need trampoline here */
1663 return create_trampoline(dbgi, mode, entity->function.irentity);
1667 case DECLARATION_KIND_COMPOUND_MEMBER:
1668 panic("not implemented reference type");
1671 panic("reference to declaration with unknown type found");
1675 * Transform calls to builtin functions.
1677 static ir_node *process_builtin_call(const call_expression_t *call)
1679 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1681 assert(call->function->kind == EXPR_REFERENCE);
1682 reference_expression_t *builtin = &call->function->reference;
1684 type_t *expr_type = skip_typeref(builtin->base.type);
1685 assert(is_type_pointer(expr_type));
1687 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1689 switch (builtin->entity->function.btk) {
1692 case BUILTIN_ALLOCA: {
1693 expression_t *argument = call->arguments->expression;
1694 ir_node *size = expression_to_firm(argument);
1696 ir_node *store = get_store();
1697 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1699 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1701 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1706 type_t *type = function_type->function.return_type;
1707 ir_mode *mode = get_ir_mode_arithmetic(type);
1708 ir_tarval *tv = get_mode_infinite(mode);
1709 ir_node *res = new_d_Const(dbgi, tv);
1713 /* Ignore string for now... */
1714 assert(is_type_function(function_type));
1715 type_t *type = function_type->function.return_type;
1716 ir_mode *mode = get_ir_mode_arithmetic(type);
1717 ir_tarval *tv = get_mode_NAN(mode);
1718 ir_node *res = new_d_Const(dbgi, tv);
1721 case BUILTIN_EXPECT: {
1722 expression_t *argument = call->arguments->expression;
1723 return _expression_to_firm(argument);
1725 case BUILTIN_VA_END:
1726 /* evaluate the argument of va_end for its side effects */
1727 _expression_to_firm(call->arguments->expression);
1729 case BUILTIN_OBJECT_SIZE: {
1730 /* determine value of "type" */
1731 expression_t *type_expression = call->arguments->next->expression;
1732 long type_val = fold_constant_to_int(type_expression);
1733 type_t *type = function_type->function.return_type;
1734 ir_mode *mode = get_ir_mode_arithmetic(type);
1735 /* just produce a "I don't know" result */
1736 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1737 get_mode_minus_one(mode);
1739 return new_d_Const(dbgi, result);
1741 case BUILTIN_ROTL: {
1742 ir_node *val = expression_to_firm(call->arguments->expression);
1743 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1744 ir_mode *mode = get_irn_mode(val);
1745 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1746 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1748 case BUILTIN_ROTR: {
1749 ir_node *val = expression_to_firm(call->arguments->expression);
1750 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1751 ir_mode *mode = get_irn_mode(val);
1752 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1753 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1754 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1755 return new_d_Rotl(dbgi, val, sub, mode);
1760 case BUILTIN_LIBC_CHECK:
1761 panic("builtin did not produce an entity");
1763 panic("invalid builtin found");
1767 * Transform a call expression.
1768 * Handles some special cases, like alloca() calls, which must be resolved
1769 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1770 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1773 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1775 dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1776 assert(currently_reachable());
1778 expression_t *function = call->function;
1779 ir_node *callee = NULL;
1780 bool firm_builtin = false;
1781 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1782 if (function->kind == EXPR_REFERENCE) {
1783 const reference_expression_t *ref = &function->reference;
1784 entity_t *entity = ref->entity;
1786 if (entity->kind == ENTITY_FUNCTION) {
1787 builtin_kind_t builtin = entity->function.btk;
1788 if (builtin == BUILTIN_FIRM) {
1789 firm_builtin = true;
1790 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1791 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1792 && builtin != BUILTIN_LIBC_CHECK) {
1793 return process_builtin_call(call);
1798 callee = expression_to_firm(function);
1800 type_t *type = skip_typeref(function->base.type);
1801 assert(is_type_pointer(type));
1802 pointer_type_t *pointer_type = &type->pointer;
1803 type_t *points_to = skip_typeref(pointer_type->points_to);
1804 assert(is_type_function(points_to));
1805 function_type_t *function_type = &points_to->function;
1807 int n_parameters = 0;
1808 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1809 ir_type *new_method_type = NULL;
1810 if (function_type->variadic || function_type->unspecified_parameters) {
1811 const call_argument_t *argument = call->arguments;
1812 for ( ; argument != NULL; argument = argument->next) {
1816 /* we need to construct a new method type matching the call
1818 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1819 int n_res = get_method_n_ress(ir_method_type);
1820 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1821 set_method_calling_convention(new_method_type,
1822 get_method_calling_convention(ir_method_type));
1823 set_method_additional_properties(new_method_type,
1824 get_method_additional_properties(ir_method_type));
1825 set_method_variadicity(new_method_type,
1826 get_method_variadicity(ir_method_type));
1828 for (int i = 0; i < n_res; ++i) {
1829 set_method_res_type(new_method_type, i,
1830 get_method_res_type(ir_method_type, i));
1832 argument = call->arguments;
1833 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1834 expression_t *expression = argument->expression;
1835 ir_type *irtype = get_ir_type(expression->base.type);
1836 set_method_param_type(new_method_type, i, irtype);
1838 ir_method_type = new_method_type;
1840 n_parameters = get_method_n_params(ir_method_type);
1843 ir_node *in[n_parameters];
1845 const call_argument_t *argument = call->arguments;
1846 for (int n = 0; n < n_parameters; ++n) {
1847 expression_t *expression = argument->expression;
1848 ir_node *arg_node = expression_to_firm(expression);
1850 type_t *arg_type = skip_typeref(expression->base.type);
1851 if (!is_type_compound(arg_type)) {
1852 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1853 arg_node = create_conv(dbgi, arg_node, mode);
1854 arg_node = do_strict_conv(dbgi, arg_node);
1859 argument = argument->next;
1863 if (function_type->modifiers & DM_CONST) {
1864 store = get_irg_no_mem(current_ir_graph);
1866 store = get_store();
1870 type_t *return_type = skip_typeref(function_type->return_type);
1871 ir_node *result = NULL;
1873 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1875 if (! (function_type->modifiers & DM_CONST)) {
1876 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1880 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1881 assert(is_type_scalar(return_type));
1882 ir_mode *mode = get_ir_mode_storage(return_type);
1883 result = new_Proj(node, mode, pn_Builtin_1_result);
1884 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1885 result = create_conv(NULL, result, mode_arith);
1888 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1889 if (! (function_type->modifiers & DM_CONST)) {
1890 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1894 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1895 ir_node *resproj = new_Proj(node, mode_T, pn_Call_T_result);
1897 if (is_type_scalar(return_type)) {
1898 ir_mode *mode = get_ir_mode_storage(return_type);
1899 result = new_Proj(resproj, mode, 0);
1900 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1901 result = create_conv(NULL, result, mode_arith);
1903 ir_mode *mode = mode_P_data;
1904 result = new_Proj(resproj, mode, 0);
1909 if (function_type->modifiers & DM_NORETURN) {
1910 /* A dead end: Keep the Call and the Block. Also place all further
1911 * nodes into a new and unreachable block. */
1913 keep_alive(get_cur_block());
1914 ir_node *block = new_Block(0, NULL);
1915 set_cur_block(block);
1921 static void statement_to_firm(statement_t *statement);
1922 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1924 static ir_node *expression_to_addr(const expression_t *expression);
1925 static ir_node *create_condition_evaluation(const expression_t *expression,
1926 ir_node *true_block,
1927 ir_node *false_block);
1929 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1932 if (!is_type_compound(type)) {
1933 ir_mode *mode = get_ir_mode_storage(type);
1934 value = create_conv(dbgi, value, mode);
1935 value = do_strict_conv(dbgi, value);
1938 ir_node *memory = get_store();
1940 if (is_type_scalar(type)) {
1941 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1942 ? cons_volatile : cons_none;
1943 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1944 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1945 set_store(store_mem);
1947 ir_type *irtype = get_ir_type(type);
1948 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1949 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1950 set_store(copyb_mem);
1954 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1956 ir_tarval *all_one = get_mode_all_one(mode);
1957 int mode_size = get_mode_size_bits(mode);
1958 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1960 assert(offset >= 0);
1962 assert(offset + size <= mode_size);
1963 if (size == mode_size) {
1967 long shiftr = get_mode_size_bits(mode) - size;
1968 long shiftl = offset;
1969 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1970 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1971 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1972 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1977 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1978 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1981 ir_type *entity_type = get_entity_type(entity);
1982 ir_type *base_type = get_primitive_base_type(entity_type);
1983 ir_mode *mode = get_type_mode(base_type);
1984 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1986 value = create_conv(dbgi, value, mode);
1988 /* kill upper bits of value and shift to right position */
1989 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1990 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1991 unsigned base_bits = get_mode_size_bits(mode);
1992 unsigned shiftwidth = base_bits - bitsize;
1994 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1995 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1997 unsigned shrwidth = base_bits - bitsize - bitoffset;
1998 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1999 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
2001 /* load current value */
2002 ir_node *mem = get_store();
2003 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
2004 set_volatile ? cons_volatile : cons_none);
2005 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2006 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2007 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
2008 ir_tarval *inv_mask = tarval_not(shift_mask);
2009 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
2010 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2012 /* construct new value and store */
2013 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
2014 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
2015 set_volatile ? cons_volatile : cons_none);
2016 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2017 set_store(store_mem);
2023 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
2024 if (mode_is_signed(mode)) {
2025 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
2027 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
2032 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2035 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2036 entity_t *entity = expression->compound_entry;
2037 type_t *base_type = entity->declaration.type;
2038 ir_mode *mode = get_ir_mode_storage(base_type);
2039 ir_node *mem = get_store();
2040 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
2041 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2042 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2043 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
2045 ir_mode *amode = mode;
2046 /* optimisation, since shifting in modes < machine_size is usually
2048 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
2051 unsigned amode_size = get_mode_size_bits(amode);
2052 load_res = create_conv(dbgi, load_res, amode);
2054 set_store(load_mem);
2056 /* kill upper bits */
2057 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2058 unsigned bitoffset = entity->compound_member.bit_offset;
2059 unsigned bitsize = entity->compound_member.bit_size;
2060 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
2061 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
2062 ir_node *countl = new_d_Const(dbgi, tvl);
2063 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
2065 unsigned shift_bitsr = bitoffset + shift_bitsl;
2066 assert(shift_bitsr <= amode_size);
2067 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
2068 ir_node *countr = new_d_Const(dbgi, tvr);
2070 if (mode_is_signed(mode)) {
2071 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
2073 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
2076 type_t *type = expression->base.type;
2077 ir_mode *resmode = get_ir_mode_arithmetic(type);
2078 return create_conv(dbgi, shiftr, resmode);
2081 /* make sure the selected compound type is constructed */
2082 static void construct_select_compound(const select_expression_t *expression)
2084 type_t *type = skip_typeref(expression->compound->base.type);
2085 if (is_type_pointer(type)) {
2086 type = type->pointer.points_to;
2088 (void) get_ir_type(type);
2091 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2092 ir_node *value, ir_node *addr)
2094 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2095 type_t *type = skip_typeref(expression->base.type);
2097 if (!is_type_compound(type)) {
2098 ir_mode *mode = get_ir_mode_storage(type);
2099 value = create_conv(dbgi, value, mode);
2100 value = do_strict_conv(dbgi, value);
2103 if (expression->kind == EXPR_REFERENCE) {
2104 const reference_expression_t *ref = &expression->reference;
2106 entity_t *entity = ref->entity;
2107 assert(is_declaration(entity));
2108 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2109 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2110 set_value(entity->variable.v.value_number, value);
2112 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2113 set_value(entity->parameter.v.value_number, value);
2119 addr = expression_to_addr(expression);
2120 assert(addr != NULL);
2122 if (expression->kind == EXPR_SELECT) {
2123 const select_expression_t *select = &expression->select;
2125 construct_select_compound(select);
2127 entity_t *entity = select->compound_entry;
2128 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2129 if (entity->compound_member.bitfield) {
2130 ir_entity *irentity = entity->compound_member.entity;
2132 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2133 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2134 set_volatile, true);
2139 assign_value(dbgi, addr, type, value);
2143 static void set_value_for_expression(const expression_t *expression,
2146 set_value_for_expression_addr(expression, value, NULL);
2149 static ir_node *get_value_from_lvalue(const expression_t *expression,
2152 if (expression->kind == EXPR_REFERENCE) {
2153 const reference_expression_t *ref = &expression->reference;
2155 entity_t *entity = ref->entity;
2156 assert(entity->kind == ENTITY_VARIABLE
2157 || entity->kind == ENTITY_PARAMETER);
2158 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2160 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2161 value_number = entity->variable.v.value_number;
2162 assert(addr == NULL);
2163 type_t *type = skip_typeref(expression->base.type);
2164 ir_mode *mode = get_ir_mode_storage(type);
2165 ir_node *res = get_value(value_number, mode);
2166 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2167 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2168 value_number = entity->parameter.v.value_number;
2169 assert(addr == NULL);
2170 type_t *type = skip_typeref(expression->base.type);
2171 ir_mode *mode = get_ir_mode_storage(type);
2172 ir_node *res = get_value(value_number, mode);
2173 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2177 assert(addr != NULL);
2178 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2181 if (expression->kind == EXPR_SELECT &&
2182 expression->select.compound_entry->compound_member.bitfield) {
2183 construct_select_compound(&expression->select);
2184 value = bitfield_extract_to_firm(&expression->select, addr);
2186 value = deref_address(dbgi, expression->base.type, addr);
2193 static ir_node *create_incdec(const unary_expression_t *expression)
2195 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2196 const expression_t *value_expr = expression->value;
2197 ir_node *addr = expression_to_addr(value_expr);
2198 ir_node *value = get_value_from_lvalue(value_expr, addr);
2200 type_t *type = skip_typeref(expression->base.type);
2201 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2204 if (is_type_pointer(type)) {
2205 pointer_type_t *pointer_type = &type->pointer;
2206 offset = get_type_size_node(pointer_type->points_to);
2208 assert(is_type_arithmetic(type));
2209 offset = new_Const(get_mode_one(mode));
2213 ir_node *store_value;
2214 switch(expression->base.kind) {
2215 case EXPR_UNARY_POSTFIX_INCREMENT:
2217 store_value = new_d_Add(dbgi, value, offset, mode);
2219 case EXPR_UNARY_POSTFIX_DECREMENT:
2221 store_value = new_d_Sub(dbgi, value, offset, mode);
2223 case EXPR_UNARY_PREFIX_INCREMENT:
2224 result = new_d_Add(dbgi, value, offset, mode);
2225 store_value = result;
2227 case EXPR_UNARY_PREFIX_DECREMENT:
2228 result = new_d_Sub(dbgi, value, offset, mode);
2229 store_value = result;
2232 panic("no incdec expr in create_incdec");
2235 set_value_for_expression_addr(value_expr, store_value, addr);
2240 static bool is_local_variable(expression_t *expression)
2242 if (expression->kind != EXPR_REFERENCE)
2244 reference_expression_t *ref_expr = &expression->reference;
2245 entity_t *entity = ref_expr->entity;
2246 if (entity->kind != ENTITY_VARIABLE)
2248 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2249 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2252 static ir_relation get_relation(const expression_kind_t kind)
2255 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2256 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2257 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2258 case EXPR_BINARY_ISLESS:
2259 case EXPR_BINARY_LESS: return ir_relation_less;
2260 case EXPR_BINARY_ISLESSEQUAL:
2261 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2262 case EXPR_BINARY_ISGREATER:
2263 case EXPR_BINARY_GREATER: return ir_relation_greater;
2264 case EXPR_BINARY_ISGREATEREQUAL:
2265 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2266 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2271 panic("trying to get pn_Cmp from non-comparison binexpr type");
2275 * Handle the assume optimizer hint: check if a Confirm
2276 * node can be created.
2278 * @param dbi debug info
2279 * @param expr the IL assume expression
2281 * we support here only some simple cases:
2286 static ir_node *handle_assume_compare(dbg_info *dbi,
2287 const binary_expression_t *expression)
2289 expression_t *op1 = expression->left;
2290 expression_t *op2 = expression->right;
2291 entity_t *var2, *var = NULL;
2292 ir_node *res = NULL;
2293 ir_relation relation = get_relation(expression->base.kind);
2295 if (is_local_variable(op1) && is_local_variable(op2)) {
2296 var = op1->reference.entity;
2297 var2 = op2->reference.entity;
2299 type_t *const type = skip_typeref(var->declaration.type);
2300 ir_mode *const mode = get_ir_mode_storage(type);
2302 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2303 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2305 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2306 set_value(var2->variable.v.value_number, res);
2308 res = new_d_Confirm(dbi, irn1, irn2, relation);
2309 set_value(var->variable.v.value_number, res);
2314 expression_t *con = NULL;
2315 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2316 var = op1->reference.entity;
2318 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2319 relation = get_inversed_relation(relation);
2320 var = op2->reference.entity;
2325 type_t *const type = skip_typeref(var->declaration.type);
2326 ir_mode *const mode = get_ir_mode_storage(type);
2328 res = get_value(var->variable.v.value_number, mode);
2329 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2330 set_value(var->variable.v.value_number, res);
2336 * Handle the assume optimizer hint.
2338 * @param dbi debug info
2339 * @param expr the IL assume expression
2341 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2343 switch(expression->kind) {
2344 case EXPR_BINARY_EQUAL:
2345 case EXPR_BINARY_NOTEQUAL:
2346 case EXPR_BINARY_LESS:
2347 case EXPR_BINARY_LESSEQUAL:
2348 case EXPR_BINARY_GREATER:
2349 case EXPR_BINARY_GREATEREQUAL:
2350 return handle_assume_compare(dbi, &expression->binary);
2356 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2357 type_t *from_type, type_t *type)
2359 type = skip_typeref(type);
2360 if (type == type_void) {
2361 /* make sure firm type is constructed */
2362 (void) get_ir_type(type);
2365 if (!is_type_scalar(type)) {
2366 /* make sure firm type is constructed */
2367 (void) get_ir_type(type);
2371 from_type = skip_typeref(from_type);
2372 ir_mode *mode = get_ir_mode_storage(type);
2373 /* check for conversion from / to __based types */
2374 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2375 const variable_t *from_var = from_type->pointer.base_variable;
2376 const variable_t *to_var = type->pointer.base_variable;
2377 if (from_var != to_var) {
2378 if (from_var != NULL) {
2379 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2380 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2381 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2383 if (to_var != NULL) {
2384 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2385 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2386 value_node = new_d_Sub(dbgi, value_node, base, mode);
2391 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2392 /* bool adjustments (we save a mode_Bu, but have to temporarily
2393 * convert to mode_b so we only get a 0/1 value */
2394 value_node = create_conv(dbgi, value_node, mode_b);
2397 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2398 ir_node *node = create_conv(dbgi, value_node, mode);
2399 node = do_strict_conv(dbgi, node);
2400 node = create_conv(dbgi, node, mode_arith);
2405 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2407 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2408 type_t *type = skip_typeref(expression->base.type);
2410 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2411 return expression_to_addr(expression->value);
2413 const expression_t *value = expression->value;
2415 switch(expression->base.kind) {
2416 case EXPR_UNARY_NEGATE: {
2417 ir_node *value_node = expression_to_firm(value);
2418 ir_mode *mode = get_ir_mode_arithmetic(type);
2419 return new_d_Minus(dbgi, value_node, mode);
2421 case EXPR_UNARY_PLUS:
2422 return expression_to_firm(value);
2423 case EXPR_UNARY_BITWISE_NEGATE: {
2424 ir_node *value_node = expression_to_firm(value);
2425 ir_mode *mode = get_ir_mode_arithmetic(type);
2426 return new_d_Not(dbgi, value_node, mode);
2428 case EXPR_UNARY_NOT: {
2429 ir_node *value_node = _expression_to_firm(value);
2430 value_node = create_conv(dbgi, value_node, mode_b);
2431 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2434 case EXPR_UNARY_DEREFERENCE: {
2435 ir_node *value_node = expression_to_firm(value);
2436 type_t *value_type = skip_typeref(value->base.type);
2437 assert(is_type_pointer(value_type));
2439 /* check for __based */
2440 const variable_t *const base_var = value_type->pointer.base_variable;
2441 if (base_var != NULL) {
2442 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2443 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2444 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2446 type_t *points_to = value_type->pointer.points_to;
2447 return deref_address(dbgi, points_to, value_node);
2449 case EXPR_UNARY_POSTFIX_INCREMENT:
2450 case EXPR_UNARY_POSTFIX_DECREMENT:
2451 case EXPR_UNARY_PREFIX_INCREMENT:
2452 case EXPR_UNARY_PREFIX_DECREMENT:
2453 return create_incdec(expression);
2454 case EXPR_UNARY_CAST: {
2455 ir_node *value_node = expression_to_firm(value);
2456 type_t *from_type = value->base.type;
2457 return create_cast(dbgi, value_node, from_type, type);
2459 case EXPR_UNARY_ASSUME:
2460 return handle_assume(dbgi, value);
2465 panic("invalid UNEXPR type found");
2469 * produces a 0/1 depending of the value of a mode_b node
2471 static ir_node *produce_condition_result(const expression_t *expression,
2472 ir_mode *mode, dbg_info *dbgi)
2474 ir_node *const one_block = new_immBlock();
2475 ir_node *const zero_block = new_immBlock();
2476 create_condition_evaluation(expression, one_block, zero_block);
2477 mature_immBlock(one_block);
2478 mature_immBlock(zero_block);
2480 ir_node *const jmp_one = new_rd_Jmp(dbgi, one_block);
2481 ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2482 ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2483 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
2484 set_cur_block(block);
2486 ir_node *const one = new_Const(get_mode_one(mode));
2487 ir_node *const zero = new_Const(get_mode_null(mode));
2488 ir_node *const in[2] = { one, zero };
2489 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
2494 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2495 ir_node *value, type_t *type)
2497 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2498 assert(is_type_pointer(type));
2499 pointer_type_t *const pointer_type = &type->pointer;
2500 type_t *const points_to = skip_typeref(pointer_type->points_to);
2501 ir_node * elem_size = get_type_size_node(points_to);
2502 elem_size = create_conv(dbgi, elem_size, mode);
2503 value = create_conv(dbgi, value, mode);
2504 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2508 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2509 ir_node *left, ir_node *right)
2512 type_t *type_left = skip_typeref(expression->left->base.type);
2513 type_t *type_right = skip_typeref(expression->right->base.type);
2515 expression_kind_t kind = expression->base.kind;
2518 case EXPR_BINARY_SHIFTLEFT:
2519 case EXPR_BINARY_SHIFTRIGHT:
2520 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2521 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2522 mode = get_ir_mode_arithmetic(expression->base.type);
2523 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2526 case EXPR_BINARY_SUB:
2527 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2528 const pointer_type_t *const ptr_type = &type_left->pointer;
2530 mode = get_ir_mode_arithmetic(expression->base.type);
2531 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2532 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2533 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2534 ir_node *const no_mem = new_NoMem();
2535 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2536 mode, op_pin_state_floats);
2537 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2540 case EXPR_BINARY_SUB_ASSIGN:
2541 if (is_type_pointer(type_left)) {
2542 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2543 mode = get_ir_mode_arithmetic(type_left);
2548 case EXPR_BINARY_ADD:
2549 case EXPR_BINARY_ADD_ASSIGN:
2550 if (is_type_pointer(type_left)) {
2551 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2552 mode = get_ir_mode_arithmetic(type_left);
2554 } else if (is_type_pointer(type_right)) {
2555 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2556 mode = get_ir_mode_arithmetic(type_right);
2563 mode = get_ir_mode_arithmetic(type_right);
2564 left = create_conv(dbgi, left, mode);
2569 case EXPR_BINARY_ADD_ASSIGN:
2570 case EXPR_BINARY_ADD:
2571 return new_d_Add(dbgi, left, right, mode);
2572 case EXPR_BINARY_SUB_ASSIGN:
2573 case EXPR_BINARY_SUB:
2574 return new_d_Sub(dbgi, left, right, mode);
2575 case EXPR_BINARY_MUL_ASSIGN:
2576 case EXPR_BINARY_MUL:
2577 return new_d_Mul(dbgi, left, right, mode);
2578 case EXPR_BINARY_BITWISE_AND:
2579 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2580 return new_d_And(dbgi, left, right, mode);
2581 case EXPR_BINARY_BITWISE_OR:
2582 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2583 return new_d_Or(dbgi, left, right, mode);
2584 case EXPR_BINARY_BITWISE_XOR:
2585 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2586 return new_d_Eor(dbgi, left, right, mode);
2587 case EXPR_BINARY_SHIFTLEFT:
2588 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2589 return new_d_Shl(dbgi, left, right, mode);
2590 case EXPR_BINARY_SHIFTRIGHT:
2591 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2592 if (mode_is_signed(mode)) {
2593 return new_d_Shrs(dbgi, left, right, mode);
2595 return new_d_Shr(dbgi, left, right, mode);
2597 case EXPR_BINARY_DIV:
2598 case EXPR_BINARY_DIV_ASSIGN: {
2599 ir_node *pin = new_Pin(new_NoMem());
2600 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2601 op_pin_state_floats);
2602 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2605 case EXPR_BINARY_MOD:
2606 case EXPR_BINARY_MOD_ASSIGN: {
2607 ir_node *pin = new_Pin(new_NoMem());
2608 assert(!mode_is_float(mode));
2609 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2610 op_pin_state_floats);
2611 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2615 panic("unexpected expression kind");
2619 static ir_node *create_lazy_op(const binary_expression_t *expression)
2621 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2622 type_t *type = skip_typeref(expression->base.type);
2623 ir_mode *mode = get_ir_mode_arithmetic(type);
2625 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2626 bool val = fold_constant_to_bool(expression->left);
2627 expression_kind_t ekind = expression->base.kind;
2628 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2629 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2631 return new_Const(get_mode_null(mode));
2635 return new_Const(get_mode_one(mode));
2639 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2640 bool valr = fold_constant_to_bool(expression->right);
2641 return create_Const_from_bool(mode, valr);
2644 return produce_condition_result(expression->right, mode, dbgi);
2647 return produce_condition_result((const expression_t*) expression, mode,
2651 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2652 ir_node *right, ir_mode *mode);
2654 static ir_node *create_assign_binop(const binary_expression_t *expression)
2656 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2657 const expression_t *left_expr = expression->left;
2658 type_t *type = skip_typeref(left_expr->base.type);
2659 ir_node *right = expression_to_firm(expression->right);
2660 ir_node *left_addr = expression_to_addr(left_expr);
2661 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2662 ir_node *result = create_op(dbgi, expression, left, right);
2664 result = create_cast(dbgi, result, expression->right->base.type, type);
2665 result = do_strict_conv(dbgi, result);
2667 result = set_value_for_expression_addr(left_expr, result, left_addr);
2669 if (!is_type_compound(type)) {
2670 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2671 result = create_conv(dbgi, result, mode_arithmetic);
2676 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2678 expression_kind_t kind = expression->base.kind;
2681 case EXPR_BINARY_EQUAL:
2682 case EXPR_BINARY_NOTEQUAL:
2683 case EXPR_BINARY_LESS:
2684 case EXPR_BINARY_LESSEQUAL:
2685 case EXPR_BINARY_GREATER:
2686 case EXPR_BINARY_GREATEREQUAL:
2687 case EXPR_BINARY_ISGREATER:
2688 case EXPR_BINARY_ISGREATEREQUAL:
2689 case EXPR_BINARY_ISLESS:
2690 case EXPR_BINARY_ISLESSEQUAL:
2691 case EXPR_BINARY_ISLESSGREATER:
2692 case EXPR_BINARY_ISUNORDERED: {
2693 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2694 ir_node *left = expression_to_firm(expression->left);
2695 ir_node *right = expression_to_firm(expression->right);
2696 ir_relation relation = get_relation(kind);
2697 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2700 case EXPR_BINARY_ASSIGN: {
2701 ir_node *addr = expression_to_addr(expression->left);
2702 ir_node *right = expression_to_firm(expression->right);
2704 = set_value_for_expression_addr(expression->left, right, addr);
2706 type_t *type = skip_typeref(expression->base.type);
2707 if (!is_type_compound(type)) {
2708 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2709 res = create_conv(NULL, res, mode_arithmetic);
2713 case EXPR_BINARY_ADD:
2714 case EXPR_BINARY_SUB:
2715 case EXPR_BINARY_MUL:
2716 case EXPR_BINARY_DIV:
2717 case EXPR_BINARY_MOD:
2718 case EXPR_BINARY_BITWISE_AND:
2719 case EXPR_BINARY_BITWISE_OR:
2720 case EXPR_BINARY_BITWISE_XOR:
2721 case EXPR_BINARY_SHIFTLEFT:
2722 case EXPR_BINARY_SHIFTRIGHT:
2724 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2725 ir_node *left = expression_to_firm(expression->left);
2726 ir_node *right = expression_to_firm(expression->right);
2727 return create_op(dbgi, expression, left, right);
2729 case EXPR_BINARY_LOGICAL_AND:
2730 case EXPR_BINARY_LOGICAL_OR:
2731 return create_lazy_op(expression);
2732 case EXPR_BINARY_COMMA:
2733 /* create side effects of left side */
2734 (void) expression_to_firm(expression->left);
2735 return _expression_to_firm(expression->right);
2737 case EXPR_BINARY_ADD_ASSIGN:
2738 case EXPR_BINARY_SUB_ASSIGN:
2739 case EXPR_BINARY_MUL_ASSIGN:
2740 case EXPR_BINARY_MOD_ASSIGN:
2741 case EXPR_BINARY_DIV_ASSIGN:
2742 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2743 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2744 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2745 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2746 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2747 return create_assign_binop(expression);
2749 panic("TODO binexpr type");
2753 static ir_node *array_access_addr(const array_access_expression_t *expression)
2755 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2756 ir_node *base_addr = expression_to_firm(expression->array_ref);
2757 ir_node *offset = expression_to_firm(expression->index);
2758 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2759 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2760 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2765 static ir_node *array_access_to_firm(
2766 const array_access_expression_t *expression)
2768 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2769 ir_node *addr = array_access_addr(expression);
2770 type_t *type = revert_automatic_type_conversion(
2771 (const expression_t*) expression);
2772 type = skip_typeref(type);
2774 return deref_address(dbgi, type, addr);
2777 static long get_offsetof_offset(const offsetof_expression_t *expression)
2779 type_t *orig_type = expression->type;
2782 designator_t *designator = expression->designator;
2783 for ( ; designator != NULL; designator = designator->next) {
2784 type_t *type = skip_typeref(orig_type);
2785 /* be sure the type is constructed */
2786 (void) get_ir_type(type);
2788 if (designator->symbol != NULL) {
2789 assert(is_type_compound(type));
2790 symbol_t *symbol = designator->symbol;
2792 compound_t *compound = type->compound.compound;
2793 entity_t *iter = compound->members.entities;
2794 for ( ; iter != NULL; iter = iter->base.next) {
2795 if (iter->base.symbol == symbol) {
2799 assert(iter != NULL);
2801 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2802 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2803 offset += get_entity_offset(iter->compound_member.entity);
2805 orig_type = iter->declaration.type;
2807 expression_t *array_index = designator->array_index;
2808 assert(designator->array_index != NULL);
2809 assert(is_type_array(type));
2811 long index = fold_constant_to_int(array_index);
2812 ir_type *arr_type = get_ir_type(type);
2813 ir_type *elem_type = get_array_element_type(arr_type);
2814 long elem_size = get_type_size_bytes(elem_type);
2816 offset += index * elem_size;
2818 orig_type = type->array.element_type;
2825 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2827 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2828 long offset = get_offsetof_offset(expression);
2829 ir_tarval *tv = new_tarval_from_long(offset, mode);
2830 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2832 return new_d_Const(dbgi, tv);
2835 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2836 ir_entity *entity, type_t *type);
2838 static ir_node *compound_literal_to_firm(
2839 const compound_literal_expression_t *expression)
2841 type_t *type = expression->type;
2843 /* create an entity on the stack */
2844 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2846 ident *const id = id_unique("CompLit.%u");
2847 ir_type *const irtype = get_ir_type(type);
2848 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2849 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2850 set_entity_ld_ident(entity, id);
2852 /* create initialisation code */
2853 initializer_t *initializer = expression->initializer;
2854 create_local_initializer(initializer, dbgi, entity, type);
2856 /* create a sel for the compound literal address */
2857 ir_node *frame = get_irg_frame(current_ir_graph);
2858 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2863 * Transform a sizeof expression into Firm code.
2865 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2867 type_t *const type = skip_typeref(expression->type);
2868 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2869 if (is_type_array(type) && type->array.is_vla
2870 && expression->tp_expression != NULL) {
2871 expression_to_firm(expression->tp_expression);
2873 /* strange gnu extensions: sizeof(function) == 1 */
2874 if (is_type_function(type)) {
2875 ir_mode *mode = get_ir_mode_storage(type_size_t);
2876 return new_Const(get_mode_one(mode));
2879 return get_type_size_node(type);
2882 static entity_t *get_expression_entity(const expression_t *expression)
2884 if (expression->kind != EXPR_REFERENCE)
2887 return expression->reference.entity;
2890 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2892 switch(entity->kind) {
2893 DECLARATION_KIND_CASES
2894 return entity->declaration.alignment;
2897 return entity->compound.alignment;
2898 case ENTITY_TYPEDEF:
2899 return entity->typedefe.alignment;
2907 * Transform an alignof expression into Firm code.
2909 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2911 unsigned alignment = 0;
2913 const expression_t *tp_expression = expression->tp_expression;
2914 if (tp_expression != NULL) {
2915 entity_t *entity = get_expression_entity(tp_expression);
2916 if (entity != NULL) {
2917 if (entity->kind == ENTITY_FUNCTION) {
2918 /* a gnu-extension */
2921 alignment = get_cparser_entity_alignment(entity);
2926 if (alignment == 0) {
2927 type_t *type = expression->type;
2928 alignment = get_type_alignment(type);
2931 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2932 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2933 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2934 return new_d_Const(dbgi, tv);
2937 static void init_ir_types(void);
2939 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2941 assert(is_type_valid(skip_typeref(expression->base.type)));
2943 bool constant_folding_old = constant_folding;
2944 constant_folding = true;
2948 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2950 ir_graph *old_current_ir_graph = current_ir_graph;
2951 current_ir_graph = get_const_code_irg();
2953 ir_node *cnst = expression_to_firm(expression);
2954 current_ir_graph = old_current_ir_graph;
2956 if (!is_Const(cnst)) {
2957 panic("couldn't fold constant");
2960 constant_folding = constant_folding_old;
2962 return get_Const_tarval(cnst);
2965 /* this function is only used in parser.c, but it relies on libfirm functionality */
2966 bool constant_is_negative(const expression_t *expression)
2968 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2969 ir_tarval *tv = fold_constant_to_tarval(expression);
2970 return tarval_is_negative(tv);
2973 long fold_constant_to_int(const expression_t *expression)
2975 if (expression->kind == EXPR_ERROR)
2978 ir_tarval *tv = fold_constant_to_tarval(expression);
2979 if (!tarval_is_long(tv)) {
2980 panic("result of constant folding is not integer");
2983 return get_tarval_long(tv);
2986 bool fold_constant_to_bool(const expression_t *expression)
2988 if (expression->kind == EXPR_ERROR)
2990 ir_tarval *tv = fold_constant_to_tarval(expression);
2991 return !tarval_is_null(tv);
2994 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2996 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2998 /* first try to fold a constant condition */
2999 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3000 bool val = fold_constant_to_bool(expression->condition);
3002 expression_t *true_expression = expression->true_expression;
3003 if (true_expression == NULL)
3004 true_expression = expression->condition;
3005 return expression_to_firm(true_expression);
3007 return expression_to_firm(expression->false_expression);
3011 ir_node *const true_block = new_immBlock();
3012 ir_node *const false_block = new_immBlock();
3013 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3014 mature_immBlock(true_block);
3015 mature_immBlock(false_block);
3017 set_cur_block(true_block);
3019 if (expression->true_expression != NULL) {
3020 true_val = expression_to_firm(expression->true_expression);
3021 } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3022 true_val = cond_expr;
3024 /* Condition ended with a short circuit (&&, ||, !) operation or a
3025 * comparison. Generate a "1" as value for the true branch. */
3026 true_val = new_Const(get_mode_one(mode_Is));
3028 ir_node *const true_jmp = new_d_Jmp(dbgi);
3030 set_cur_block(false_block);
3031 ir_node *const false_val = expression_to_firm(expression->false_expression);
3032 ir_node *const false_jmp = new_d_Jmp(dbgi);
3034 /* create the common block */
3035 ir_node *const in_cf[2] = { true_jmp, false_jmp };
3036 ir_node *const block = new_Block(lengthof(in_cf), in_cf);
3037 set_cur_block(block);
3039 /* TODO improve static semantics, so either both or no values are NULL */
3040 if (true_val == NULL || false_val == NULL)
3043 ir_node *const in[2] = { true_val, false_val };
3044 type_t *const type = skip_typeref(expression->base.type);
3046 if (is_type_compound(type)) {
3049 mode = get_ir_mode_arithmetic(type);
3051 ir_node *const val = new_d_Phi(dbgi, lengthof(in), in, mode);
3057 * Returns an IR-node representing the address of a field.
3059 static ir_node *select_addr(const select_expression_t *expression)
3061 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3063 construct_select_compound(expression);
3065 ir_node *compound_addr = expression_to_firm(expression->compound);
3067 entity_t *entry = expression->compound_entry;
3068 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3069 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3071 if (constant_folding) {
3072 ir_mode *mode = get_irn_mode(compound_addr);
3073 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3074 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3075 return new_d_Add(dbgi, compound_addr, ofs, mode);
3077 ir_entity *irentity = entry->compound_member.entity;
3078 assert(irentity != NULL);
3079 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3083 static ir_node *select_to_firm(const select_expression_t *expression)
3085 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3086 ir_node *addr = select_addr(expression);
3087 type_t *type = revert_automatic_type_conversion(
3088 (const expression_t*) expression);
3089 type = skip_typeref(type);
3091 entity_t *entry = expression->compound_entry;
3092 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3094 if (entry->compound_member.bitfield) {
3095 return bitfield_extract_to_firm(expression, addr);
3098 return deref_address(dbgi, type, addr);
3101 /* Values returned by __builtin_classify_type. */
3102 typedef enum gcc_type_class
3108 enumeral_type_class,
3111 reference_type_class,
3115 function_type_class,
3126 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3128 type_t *type = expr->type_expression->base.type;
3130 /* FIXME gcc returns different values depending on whether compiling C or C++
3131 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3134 type = skip_typeref(type);
3135 switch (type->kind) {
3137 const atomic_type_t *const atomic_type = &type->atomic;
3138 switch (atomic_type->akind) {
3139 /* should not be reached */
3140 case ATOMIC_TYPE_INVALID:
3144 /* gcc cannot do that */
3145 case ATOMIC_TYPE_VOID:
3146 tc = void_type_class;
3149 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3150 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3151 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3152 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3153 case ATOMIC_TYPE_SHORT:
3154 case ATOMIC_TYPE_USHORT:
3155 case ATOMIC_TYPE_INT:
3156 case ATOMIC_TYPE_UINT:
3157 case ATOMIC_TYPE_LONG:
3158 case ATOMIC_TYPE_ULONG:
3159 case ATOMIC_TYPE_LONGLONG:
3160 case ATOMIC_TYPE_ULONGLONG:
3161 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3162 tc = integer_type_class;
3165 case ATOMIC_TYPE_FLOAT:
3166 case ATOMIC_TYPE_DOUBLE:
3167 case ATOMIC_TYPE_LONG_DOUBLE:
3168 tc = real_type_class;
3171 panic("Unexpected atomic type in classify_type_to_firm().");
3174 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3175 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3176 case TYPE_ARRAY: /* gcc handles this as pointer */
3177 case TYPE_FUNCTION: /* gcc handles this as pointer */
3178 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3179 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3180 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3182 /* gcc handles this as integer */
3183 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3185 /* gcc classifies the referenced type */
3186 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3188 /* typedef/typeof should be skipped already */
3194 panic("unexpected TYPE classify_type_to_firm().");
3198 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3199 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3200 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3201 return new_d_Const(dbgi, tv);
3204 static ir_node *function_name_to_firm(
3205 const funcname_expression_t *const expr)
3207 switch(expr->kind) {
3208 case FUNCNAME_FUNCTION:
3209 case FUNCNAME_PRETTY_FUNCTION:
3210 case FUNCNAME_FUNCDNAME:
3211 if (current_function_name == NULL) {
3212 const source_position_t *const src_pos = &expr->base.source_position;
3213 const char *name = current_function_entity->base.symbol->string;
3214 const string_t string = { name, strlen(name) + 1 };
3215 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3217 return current_function_name;
3218 case FUNCNAME_FUNCSIG:
3219 if (current_funcsig == NULL) {
3220 const source_position_t *const src_pos = &expr->base.source_position;
3221 ir_entity *ent = get_irg_entity(current_ir_graph);
3222 const char *const name = get_entity_ld_name(ent);
3223 const string_t string = { name, strlen(name) + 1 };
3224 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3226 return current_funcsig;
3228 panic("Unsupported function name");
3231 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3233 statement_t *statement = expr->statement;
3235 assert(statement->kind == STATEMENT_COMPOUND);
3236 return compound_statement_to_firm(&statement->compound);
3239 static ir_node *va_start_expression_to_firm(
3240 const va_start_expression_t *const expr)
3242 ir_entity *param_ent = current_vararg_entity;
3243 if (param_ent == NULL) {
3244 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3245 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3246 ir_type *const param_type = get_unknown_type();
3247 param_ent = new_parameter_entity(frame_type, n, param_type);
3248 current_vararg_entity = param_ent;
3251 ir_node *const frame = get_irg_frame(current_ir_graph);
3252 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3253 ir_node *const no_mem = new_NoMem();
3254 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3256 set_value_for_expression(expr->ap, arg_sel);
3261 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3263 type_t *const type = expr->base.type;
3264 expression_t *const ap_expr = expr->ap;
3265 ir_node *const ap_addr = expression_to_addr(ap_expr);
3266 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3267 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3268 ir_node *const res = deref_address(dbgi, type, ap);
3270 ir_node *const cnst = get_type_size_node(expr->base.type);
3271 ir_mode *const mode = get_irn_mode(cnst);
3272 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3273 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3274 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3275 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3276 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3278 set_value_for_expression_addr(ap_expr, add, ap_addr);
3284 * Generate Firm for a va_copy expression.
3286 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3288 ir_node *const src = expression_to_firm(expr->src);
3289 set_value_for_expression(expr->dst, src);
3293 static ir_node *dereference_addr(const unary_expression_t *const expression)
3295 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3296 return expression_to_firm(expression->value);
3300 * Returns a IR-node representing an lvalue of the given expression.
3302 static ir_node *expression_to_addr(const expression_t *expression)
3304 switch(expression->kind) {
3305 case EXPR_ARRAY_ACCESS:
3306 return array_access_addr(&expression->array_access);
3308 return call_expression_to_firm(&expression->call);
3309 case EXPR_COMPOUND_LITERAL:
3310 return compound_literal_to_firm(&expression->compound_literal);
3311 case EXPR_REFERENCE:
3312 return reference_addr(&expression->reference);
3314 return select_addr(&expression->select);
3315 case EXPR_UNARY_DEREFERENCE:
3316 return dereference_addr(&expression->unary);
3320 panic("trying to get address of non-lvalue");
3323 static ir_node *builtin_constant_to_firm(
3324 const builtin_constant_expression_t *expression)
3326 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3327 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3328 return create_Const_from_bool(mode, v);
3331 static ir_node *builtin_types_compatible_to_firm(
3332 const builtin_types_compatible_expression_t *expression)
3334 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3335 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3336 bool const value = types_compatible(left, right);
3337 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3338 return create_Const_from_bool(mode, value);
3341 static ir_node *get_label_block(label_t *label)
3343 if (label->block != NULL)
3344 return label->block;
3346 /* beware: might be called from create initializer with current_ir_graph
3347 * set to const_code_irg. */
3348 ir_graph *rem = current_ir_graph;
3349 current_ir_graph = current_function;
3351 ir_node *block = new_immBlock();
3353 label->block = block;
3355 ARR_APP1(label_t *, all_labels, label);
3357 current_ir_graph = rem;
3362 * Pointer to a label. This is used for the
3363 * GNU address-of-label extension.
3365 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3367 dbg_info *dbgi = get_dbg_info(&label->base.source_position);
3368 ir_node *block = get_label_block(label->label);
3369 ir_entity *entity = create_Block_entity(block);
3371 symconst_symbol value;
3372 value.entity_p = entity;
3373 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3376 static ir_node *error_to_firm(const expression_t *expression)
3378 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3379 return new_Bad(mode);
3383 * creates firm nodes for an expression. The difference between this function
3384 * and expression_to_firm is, that this version might produce mode_b nodes
3385 * instead of mode_Is.
3387 static ir_node *_expression_to_firm(const expression_t *expression)
3390 if (!constant_folding) {
3391 assert(!expression->base.transformed);
3392 ((expression_t*) expression)->base.transformed = true;
3396 switch (expression->kind) {
3398 return literal_to_firm(&expression->literal);
3399 case EXPR_STRING_LITERAL:
3400 return string_to_firm(&expression->base.source_position, "str.%u",
3401 &expression->literal.value);
3402 case EXPR_WIDE_STRING_LITERAL:
3403 return wide_string_literal_to_firm(&expression->string_literal);
3404 case EXPR_REFERENCE:
3405 return reference_expression_to_firm(&expression->reference);
3406 case EXPR_REFERENCE_ENUM_VALUE:
3407 return reference_expression_enum_value_to_firm(&expression->reference);
3409 return call_expression_to_firm(&expression->call);
3411 return unary_expression_to_firm(&expression->unary);
3413 return binary_expression_to_firm(&expression->binary);
3414 case EXPR_ARRAY_ACCESS:
3415 return array_access_to_firm(&expression->array_access);
3417 return sizeof_to_firm(&expression->typeprop);
3419 return alignof_to_firm(&expression->typeprop);
3420 case EXPR_CONDITIONAL:
3421 return conditional_to_firm(&expression->conditional);
3423 return select_to_firm(&expression->select);
3424 case EXPR_CLASSIFY_TYPE:
3425 return classify_type_to_firm(&expression->classify_type);
3427 return function_name_to_firm(&expression->funcname);
3428 case EXPR_STATEMENT:
3429 return statement_expression_to_firm(&expression->statement);
3431 return va_start_expression_to_firm(&expression->va_starte);
3433 return va_arg_expression_to_firm(&expression->va_arge);
3435 return va_copy_expression_to_firm(&expression->va_copye);
3436 case EXPR_BUILTIN_CONSTANT_P:
3437 return builtin_constant_to_firm(&expression->builtin_constant);
3438 case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3439 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3441 return offsetof_to_firm(&expression->offsetofe);
3442 case EXPR_COMPOUND_LITERAL:
3443 return compound_literal_to_firm(&expression->compound_literal);
3444 case EXPR_LABEL_ADDRESS:
3445 return label_address_to_firm(&expression->label_address);
3448 return error_to_firm(expression);
3450 panic("invalid expression found");
3454 * Check if a given expression is a GNU __builtin_expect() call.
3456 static bool is_builtin_expect(const expression_t *expression)
3458 if (expression->kind != EXPR_CALL)
3461 expression_t *function = expression->call.function;
3462 if (function->kind != EXPR_REFERENCE)
3464 reference_expression_t *ref = &function->reference;
3465 if (ref->entity->kind != ENTITY_FUNCTION ||
3466 ref->entity->function.btk != BUILTIN_EXPECT)
3472 static bool produces_mode_b(const expression_t *expression)
3474 switch (expression->kind) {
3475 case EXPR_BINARY_EQUAL:
3476 case EXPR_BINARY_NOTEQUAL:
3477 case EXPR_BINARY_LESS:
3478 case EXPR_BINARY_LESSEQUAL:
3479 case EXPR_BINARY_GREATER:
3480 case EXPR_BINARY_GREATEREQUAL:
3481 case EXPR_BINARY_ISGREATER:
3482 case EXPR_BINARY_ISGREATEREQUAL:
3483 case EXPR_BINARY_ISLESS:
3484 case EXPR_BINARY_ISLESSEQUAL:
3485 case EXPR_BINARY_ISLESSGREATER:
3486 case EXPR_BINARY_ISUNORDERED:
3487 case EXPR_UNARY_NOT:
3491 if (is_builtin_expect(expression)) {
3492 expression_t *argument = expression->call.arguments->expression;
3493 return produces_mode_b(argument);
3496 case EXPR_BINARY_COMMA:
3497 return produces_mode_b(expression->binary.right);
3504 static ir_node *expression_to_firm(const expression_t *expression)
3506 if (!produces_mode_b(expression)) {
3507 ir_node *res = _expression_to_firm(expression);
3508 assert(res == NULL || get_irn_mode(res) != mode_b);
3512 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3513 bool const constant_folding_old = constant_folding;
3514 constant_folding = true;
3515 ir_node *res = _expression_to_firm(expression);
3516 constant_folding = constant_folding_old;
3517 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3518 assert(is_Const(res));
3519 return create_Const_from_bool(mode, !is_Const_null(res));
3522 /* we have to produce a 0/1 from the mode_b expression */
3523 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3524 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3525 return produce_condition_result(expression, mode, dbgi);
3529 * create a short-circuit expression evaluation that tries to construct
3530 * efficient control flow structures for &&, || and ! expressions
3532 static ir_node *create_condition_evaluation(const expression_t *expression,
3533 ir_node *true_block,
3534 ir_node *false_block)
3536 switch(expression->kind) {
3537 case EXPR_UNARY_NOT: {
3538 const unary_expression_t *unary_expression = &expression->unary;
3539 create_condition_evaluation(unary_expression->value, false_block,
3543 case EXPR_BINARY_LOGICAL_AND: {
3544 const binary_expression_t *binary_expression = &expression->binary;
3546 ir_node *extra_block = new_immBlock();
3547 create_condition_evaluation(binary_expression->left, extra_block,
3549 mature_immBlock(extra_block);
3550 set_cur_block(extra_block);
3551 create_condition_evaluation(binary_expression->right, true_block,
3555 case EXPR_BINARY_LOGICAL_OR: {
3556 const binary_expression_t *binary_expression = &expression->binary;
3558 ir_node *extra_block = new_immBlock();
3559 create_condition_evaluation(binary_expression->left, true_block,
3561 mature_immBlock(extra_block);
3562 set_cur_block(extra_block);
3563 create_condition_evaluation(binary_expression->right, true_block,
3571 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3572 ir_node *cond_expr = _expression_to_firm(expression);
3573 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3574 ir_node *cond = new_d_Cond(dbgi, condition);
3575 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3576 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3578 /* set branch prediction info based on __builtin_expect */
3579 if (is_builtin_expect(expression) && is_Cond(cond)) {
3580 call_argument_t *argument = expression->call.arguments->next;
3581 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3582 bool const cnst = fold_constant_to_bool(argument->expression);
3583 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3584 set_Cond_jmp_pred(cond, pred);
3588 add_immBlock_pred(true_block, true_proj);
3589 add_immBlock_pred(false_block, false_proj);
3591 set_unreachable_now();
3595 static void create_variable_entity(entity_t *variable,
3596 declaration_kind_t declaration_kind,
3597 ir_type *parent_type)
3599 assert(variable->kind == ENTITY_VARIABLE);
3600 type_t *type = skip_typeref(variable->declaration.type);
3602 ident *const id = new_id_from_str(variable->base.symbol->string);
3603 ir_type *const irtype = get_ir_type(type);
3604 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3605 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3606 unsigned alignment = variable->declaration.alignment;
3608 set_entity_alignment(irentity, alignment);
3610 handle_decl_modifiers(irentity, variable);
3612 variable->declaration.kind = (unsigned char) declaration_kind;
3613 variable->variable.v.entity = irentity;
3614 set_entity_ld_ident(irentity, create_ld_ident(variable));
3616 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3617 set_entity_volatility(irentity, volatility_is_volatile);
3622 typedef struct type_path_entry_t type_path_entry_t;
3623 struct type_path_entry_t {
3625 ir_initializer_t *initializer;
3627 entity_t *compound_entry;
3630 typedef struct type_path_t type_path_t;
3631 struct type_path_t {
3632 type_path_entry_t *path;
3637 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3639 size_t len = ARR_LEN(path->path);
3641 for (size_t i = 0; i < len; ++i) {
3642 const type_path_entry_t *entry = & path->path[i];
3644 type_t *type = skip_typeref(entry->type);
3645 if (is_type_compound(type)) {
3646 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3647 } else if (is_type_array(type)) {
3648 fprintf(stderr, "[%u]", (unsigned) entry->index);
3650 fprintf(stderr, "-INVALID-");
3653 fprintf(stderr, " (");
3654 print_type(path->top_type);
3655 fprintf(stderr, ")");
3658 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3660 size_t len = ARR_LEN(path->path);
3662 return & path->path[len-1];
3665 static type_path_entry_t *append_to_type_path(type_path_t *path)
3667 size_t len = ARR_LEN(path->path);
3668 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3670 type_path_entry_t *result = & path->path[len];
3671 memset(result, 0, sizeof(result[0]));
3675 static size_t get_compound_member_count(const compound_type_t *type)
3677 compound_t *compound = type->compound;
3678 size_t n_members = 0;
3679 entity_t *member = compound->members.entities;
3680 for ( ; member != NULL; member = member->base.next) {
3687 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3689 type_t *orig_top_type = path->top_type;
3690 type_t *top_type = skip_typeref(orig_top_type);
3692 assert(is_type_compound(top_type) || is_type_array(top_type));
3694 if (ARR_LEN(path->path) == 0) {
3697 type_path_entry_t *top = get_type_path_top(path);
3698 ir_initializer_t *initializer = top->initializer;
3699 return get_initializer_compound_value(initializer, top->index);
3703 static void descend_into_subtype(type_path_t *path)
3705 type_t *orig_top_type = path->top_type;
3706 type_t *top_type = skip_typeref(orig_top_type);
3708 assert(is_type_compound(top_type) || is_type_array(top_type));
3710 ir_initializer_t *initializer = get_initializer_entry(path);
3712 type_path_entry_t *top = append_to_type_path(path);
3713 top->type = top_type;
3717 if (is_type_compound(top_type)) {
3718 compound_t *const compound = top_type->compound.compound;
3719 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3721 top->compound_entry = entry;
3723 len = get_compound_member_count(&top_type->compound);
3724 if (entry != NULL) {
3725 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3726 path->top_type = entry->declaration.type;
3729 assert(is_type_array(top_type));
3730 assert(top_type->array.size > 0);
3733 path->top_type = top_type->array.element_type;
3734 len = top_type->array.size;
3736 if (initializer == NULL
3737 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3738 initializer = create_initializer_compound(len);
3739 /* we have to set the entry at the 2nd latest path entry... */
3740 size_t path_len = ARR_LEN(path->path);
3741 assert(path_len >= 1);
3743 type_path_entry_t *entry = & path->path[path_len-2];
3744 ir_initializer_t *tinitializer = entry->initializer;
3745 set_initializer_compound_value(tinitializer, entry->index,
3749 top->initializer = initializer;
3752 static void ascend_from_subtype(type_path_t *path)
3754 type_path_entry_t *top = get_type_path_top(path);
3756 path->top_type = top->type;
3758 size_t len = ARR_LEN(path->path);
3759 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3762 static void walk_designator(type_path_t *path, const designator_t *designator)
3764 /* designators start at current object type */
3765 ARR_RESIZE(type_path_entry_t, path->path, 1);
3767 for ( ; designator != NULL; designator = designator->next) {
3768 type_path_entry_t *top = get_type_path_top(path);
3769 type_t *orig_type = top->type;
3770 type_t *type = skip_typeref(orig_type);
3772 if (designator->symbol != NULL) {
3773 assert(is_type_compound(type));
3775 symbol_t *symbol = designator->symbol;
3777 compound_t *compound = type->compound.compound;
3778 entity_t *iter = compound->members.entities;
3779 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3780 if (iter->base.symbol == symbol) {
3781 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3785 assert(iter != NULL);
3787 /* revert previous initialisations of other union elements */
3788 if (type->kind == TYPE_COMPOUND_UNION) {
3789 ir_initializer_t *initializer = top->initializer;
3790 if (initializer != NULL
3791 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3792 /* are we writing to a new element? */
3793 ir_initializer_t *oldi
3794 = get_initializer_compound_value(initializer, index);
3795 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3796 /* clear initializer */
3798 = get_initializer_compound_n_entries(initializer);
3799 ir_initializer_t *nulli = get_initializer_null();
3800 for (size_t i = 0; i < len; ++i) {
3801 set_initializer_compound_value(initializer, i,
3808 top->type = orig_type;
3809 top->compound_entry = iter;
3811 orig_type = iter->declaration.type;
3813 expression_t *array_index = designator->array_index;
3814 assert(designator->array_index != NULL);
3815 assert(is_type_array(type));
3817 long index = fold_constant_to_int(array_index);
3820 if (type->array.size_constant) {
3821 long array_size = type->array.size;
3822 assert(index < array_size);
3826 top->type = orig_type;
3827 top->index = (size_t) index;
3828 orig_type = type->array.element_type;
3830 path->top_type = orig_type;
3832 if (designator->next != NULL) {
3833 descend_into_subtype(path);
3837 path->invalid = false;
3840 static void advance_current_object(type_path_t *path)
3842 if (path->invalid) {
3843 /* TODO: handle this... */
3844 panic("invalid initializer in ast2firm (excessive elements)");
3847 type_path_entry_t *top = get_type_path_top(path);
3849 type_t *type = skip_typeref(top->type);
3850 if (is_type_union(type)) {
3851 /* only the first element is initialized in unions */
3852 top->compound_entry = NULL;
3853 } else if (is_type_struct(type)) {
3854 entity_t *entry = top->compound_entry;
3857 entry = skip_unnamed_bitfields(entry->base.next);
3858 top->compound_entry = entry;
3859 if (entry != NULL) {
3860 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3861 path->top_type = entry->declaration.type;
3865 assert(is_type_array(type));
3868 if (!type->array.size_constant || top->index < type->array.size) {
3873 /* we're past the last member of the current sub-aggregate, try if we
3874 * can ascend in the type hierarchy and continue with another subobject */
3875 size_t len = ARR_LEN(path->path);
3878 ascend_from_subtype(path);
3879 advance_current_object(path);
3881 path->invalid = true;
3886 static ir_initializer_t *create_ir_initializer(
3887 const initializer_t *initializer, type_t *type);
3889 static ir_initializer_t *create_ir_initializer_value(
3890 const initializer_value_t *initializer)
3892 if (is_type_compound(initializer->value->base.type)) {
3893 panic("initializer creation for compounds not implemented yet");
3895 type_t *type = initializer->value->base.type;
3896 expression_t *expr = initializer->value;
3897 ir_node *value = expression_to_firm(expr);
3898 ir_mode *mode = get_ir_mode_storage(type);
3899 value = create_conv(NULL, value, mode);
3900 return create_initializer_const(value);
3903 /** test wether type can be initialized by a string constant */
3904 static bool is_string_type(type_t *type)
3907 if (is_type_pointer(type)) {
3908 inner = skip_typeref(type->pointer.points_to);
3909 } else if(is_type_array(type)) {
3910 inner = skip_typeref(type->array.element_type);
3915 return is_type_integer(inner);
3918 static ir_initializer_t *create_ir_initializer_list(
3919 const initializer_list_t *initializer, type_t *type)
3922 memset(&path, 0, sizeof(path));
3923 path.top_type = type;
3924 path.path = NEW_ARR_F(type_path_entry_t, 0);
3926 descend_into_subtype(&path);
3928 for (size_t i = 0; i < initializer->len; ++i) {
3929 const initializer_t *sub_initializer = initializer->initializers[i];
3931 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3932 walk_designator(&path, sub_initializer->designator.designator);
3936 if (sub_initializer->kind == INITIALIZER_VALUE) {
3937 /* we might have to descend into types until we're at a scalar
3940 type_t *orig_top_type = path.top_type;
3941 type_t *top_type = skip_typeref(orig_top_type);
3943 if (is_type_scalar(top_type))
3945 descend_into_subtype(&path);
3947 } else if (sub_initializer->kind == INITIALIZER_STRING
3948 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3949 /* we might have to descend into types until we're at a scalar
3952 type_t *orig_top_type = path.top_type;
3953 type_t *top_type = skip_typeref(orig_top_type);
3955 if (is_string_type(top_type))
3957 descend_into_subtype(&path);
3961 ir_initializer_t *sub_irinitializer
3962 = create_ir_initializer(sub_initializer, path.top_type);
3964 size_t path_len = ARR_LEN(path.path);
3965 assert(path_len >= 1);
3966 type_path_entry_t *entry = & path.path[path_len-1];
3967 ir_initializer_t *tinitializer = entry->initializer;
3968 set_initializer_compound_value(tinitializer, entry->index,
3971 advance_current_object(&path);
3974 assert(ARR_LEN(path.path) >= 1);
3975 ir_initializer_t *result = path.path[0].initializer;
3976 DEL_ARR_F(path.path);
3981 static ir_initializer_t *create_ir_initializer_string(
3982 const initializer_string_t *initializer, type_t *type)
3984 type = skip_typeref(type);
3986 size_t string_len = initializer->string.size;
3987 assert(type->kind == TYPE_ARRAY);
3988 assert(type->array.size_constant);
3989 size_t len = type->array.size;
3990 ir_initializer_t *irinitializer = create_initializer_compound(len);
3992 const char *string = initializer->string.begin;
3993 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3995 for (size_t i = 0; i < len; ++i) {
4000 ir_tarval *tv = new_tarval_from_long(c, mode);
4001 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4003 set_initializer_compound_value(irinitializer, i, char_initializer);
4006 return irinitializer;
4009 static ir_initializer_t *create_ir_initializer_wide_string(
4010 const initializer_wide_string_t *initializer, type_t *type)
4012 assert(type->kind == TYPE_ARRAY);
4013 assert(type->array.size_constant);
4014 size_t len = type->array.size;
4015 size_t string_len = wstrlen(&initializer->string);
4016 ir_initializer_t *irinitializer = create_initializer_compound(len);
4018 const char *p = initializer->string.begin;
4019 ir_mode *mode = get_type_mode(ir_type_wchar_t);
4021 for (size_t i = 0; i < len; ++i) {
4023 if (i < string_len) {
4024 c = read_utf8_char(&p);
4026 ir_tarval *tv = new_tarval_from_long(c, mode);
4027 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4029 set_initializer_compound_value(irinitializer, i, char_initializer);
4032 return irinitializer;
4035 static ir_initializer_t *create_ir_initializer(
4036 const initializer_t *initializer, type_t *type)
4038 switch(initializer->kind) {
4039 case INITIALIZER_STRING:
4040 return create_ir_initializer_string(&initializer->string, type);
4042 case INITIALIZER_WIDE_STRING:
4043 return create_ir_initializer_wide_string(&initializer->wide_string,
4046 case INITIALIZER_LIST:
4047 return create_ir_initializer_list(&initializer->list, type);
4049 case INITIALIZER_VALUE:
4050 return create_ir_initializer_value(&initializer->value);
4052 case INITIALIZER_DESIGNATOR:
4053 panic("unexpected designator initializer found");
4055 panic("unknown initializer");
4058 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
4059 * are elements [...] the remainder of the aggregate shall be initialized
4060 * implicitly the same as objects that have static storage duration. */
4061 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4064 /* for unions we must NOT do anything for null initializers */
4065 ir_type *owner = get_entity_owner(entity);
4066 if (is_Union_type(owner)) {
4070 ir_type *ent_type = get_entity_type(entity);
4071 /* create sub-initializers for a compound type */
4072 if (is_compound_type(ent_type)) {
4073 unsigned n_members = get_compound_n_members(ent_type);
4074 for (unsigned n = 0; n < n_members; ++n) {
4075 ir_entity *member = get_compound_member(ent_type, n);
4076 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4078 create_dynamic_null_initializer(member, dbgi, addr);
4082 if (is_Array_type(ent_type)) {
4083 assert(has_array_upper_bound(ent_type, 0));
4084 long n = get_array_upper_bound_int(ent_type, 0);
4085 for (long i = 0; i < n; ++i) {
4086 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4087 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4088 ir_node *cnst = new_d_Const(dbgi, index_tv);
4089 ir_node *in[1] = { cnst };
4090 ir_entity *arrent = get_array_element_entity(ent_type);
4091 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4093 create_dynamic_null_initializer(arrent, dbgi, addr);
4098 ir_mode *value_mode = get_type_mode(ent_type);
4099 ir_node *node = new_Const(get_mode_null(value_mode));
4101 /* is it a bitfield type? */
4102 if (is_Primitive_type(ent_type) &&
4103 get_primitive_base_type(ent_type) != NULL) {
4104 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4108 ir_node *mem = get_store();
4109 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4110 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4114 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4115 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4117 switch(get_initializer_kind(initializer)) {
4118 case IR_INITIALIZER_NULL:
4119 create_dynamic_null_initializer(entity, dbgi, base_addr);
4121 case IR_INITIALIZER_CONST: {
4122 ir_node *node = get_initializer_const_value(initializer);
4123 ir_type *ent_type = get_entity_type(entity);
4125 /* is it a bitfield type? */
4126 if (is_Primitive_type(ent_type) &&
4127 get_primitive_base_type(ent_type) != NULL) {
4128 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
4132 assert(get_type_mode(type) == get_irn_mode(node));
4133 ir_node *mem = get_store();
4134 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4135 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4139 case IR_INITIALIZER_TARVAL: {
4140 ir_tarval *tv = get_initializer_tarval_value(initializer);
4141 ir_node *cnst = new_d_Const(dbgi, tv);
4142 ir_type *ent_type = get_entity_type(entity);
4144 /* is it a bitfield type? */
4145 if (is_Primitive_type(ent_type) &&
4146 get_primitive_base_type(ent_type) != NULL) {
4147 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4151 assert(get_type_mode(type) == get_tarval_mode(tv));
4152 ir_node *mem = get_store();
4153 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4154 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4158 case IR_INITIALIZER_COMPOUND: {
4159 assert(is_compound_type(type) || is_Array_type(type));
4161 if (is_Array_type(type)) {
4162 assert(has_array_upper_bound(type, 0));
4163 n_members = get_array_upper_bound_int(type, 0);
4165 n_members = get_compound_n_members(type);
4168 if (get_initializer_compound_n_entries(initializer)
4169 != (unsigned) n_members)
4170 panic("initializer doesn't match compound type");
4172 for (int i = 0; i < n_members; ++i) {
4175 ir_entity *sub_entity;
4176 if (is_Array_type(type)) {
4177 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4178 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4179 ir_node *cnst = new_d_Const(dbgi, index_tv);
4180 ir_node *in[1] = { cnst };
4181 irtype = get_array_element_type(type);
4182 sub_entity = get_array_element_entity(type);
4183 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4186 sub_entity = get_compound_member(type, i);
4187 irtype = get_entity_type(sub_entity);
4188 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4192 ir_initializer_t *sub_init
4193 = get_initializer_compound_value(initializer, i);
4195 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4202 panic("invalid IR_INITIALIZER found");
4205 static void create_dynamic_initializer(ir_initializer_t *initializer,
4206 dbg_info *dbgi, ir_entity *entity)
4208 ir_node *frame = get_irg_frame(current_ir_graph);
4209 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4210 ir_type *type = get_entity_type(entity);
4212 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4215 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4216 ir_entity *entity, type_t *type)
4218 ir_node *memory = get_store();
4219 ir_node *nomem = new_NoMem();
4220 ir_node *frame = get_irg_frame(current_ir_graph);
4221 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4223 if (initializer->kind == INITIALIZER_VALUE) {
4224 initializer_value_t *initializer_value = &initializer->value;
4226 ir_node *value = expression_to_firm(initializer_value->value);
4227 type = skip_typeref(type);
4228 assign_value(dbgi, addr, type, value);
4232 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4233 ir_initializer_t *irinitializer
4234 = create_ir_initializer(initializer, type);
4236 create_dynamic_initializer(irinitializer, dbgi, entity);
4240 /* create the ir_initializer */
4241 ir_graph *const old_current_ir_graph = current_ir_graph;
4242 current_ir_graph = get_const_code_irg();
4244 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4246 assert(current_ir_graph == get_const_code_irg());
4247 current_ir_graph = old_current_ir_graph;
4249 /* create a "template" entity which is copied to the entity on the stack */
4250 ident *const id = id_unique("initializer.%u");
4251 ir_type *const irtype = get_ir_type(type);
4252 ir_type *const global_type = get_glob_type();
4253 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4254 set_entity_ld_ident(init_entity, id);
4256 set_entity_visibility(init_entity, ir_visibility_private);
4257 add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4259 set_entity_initializer(init_entity, irinitializer);
4261 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4262 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4264 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4265 set_store(copyb_mem);
4268 static void create_initializer_local_variable_entity(entity_t *entity)
4270 assert(entity->kind == ENTITY_VARIABLE);
4271 initializer_t *initializer = entity->variable.initializer;
4272 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4273 ir_entity *irentity = entity->variable.v.entity;
4274 type_t *type = entity->declaration.type;
4276 create_local_initializer(initializer, dbgi, irentity, type);
4279 static void create_variable_initializer(entity_t *entity)
4281 assert(entity->kind == ENTITY_VARIABLE);
4282 initializer_t *initializer = entity->variable.initializer;
4283 if (initializer == NULL)
4286 declaration_kind_t declaration_kind
4287 = (declaration_kind_t) entity->declaration.kind;
4288 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4289 create_initializer_local_variable_entity(entity);
4293 type_t *type = entity->declaration.type;
4294 type_qualifiers_t tq = get_type_qualifier(type, true);
4296 if (initializer->kind == INITIALIZER_VALUE) {
4297 initializer_value_t *initializer_value = &initializer->value;
4298 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4300 ir_node *value = expression_to_firm(initializer_value->value);
4302 type_t *init_type = initializer_value->value->base.type;
4303 ir_mode *mode = get_ir_mode_storage(init_type);
4304 value = create_conv(dbgi, value, mode);
4305 value = do_strict_conv(dbgi, value);
4307 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4308 set_value(entity->variable.v.value_number, value);
4310 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4312 ir_entity *irentity = entity->variable.v.entity;
4314 if (tq & TYPE_QUALIFIER_CONST
4315 && get_entity_owner(irentity) != get_tls_type()) {
4316 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4318 set_atomic_ent_value(irentity, value);
4321 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4322 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4324 ir_entity *irentity = entity->variable.v.entity;
4325 ir_initializer_t *irinitializer
4326 = create_ir_initializer(initializer, type);
4328 if (tq & TYPE_QUALIFIER_CONST) {
4329 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4331 set_entity_initializer(irentity, irinitializer);
4335 static void create_variable_length_array(entity_t *entity)
4337 assert(entity->kind == ENTITY_VARIABLE);
4338 assert(entity->variable.initializer == NULL);
4340 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4341 entity->variable.v.vla_base = NULL;
4343 /* TODO: record VLA somewhere so we create the free node when we leave
4347 static void allocate_variable_length_array(entity_t *entity)
4349 assert(entity->kind == ENTITY_VARIABLE);
4350 assert(entity->variable.initializer == NULL);
4351 assert(currently_reachable());
4353 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4354 type_t *type = entity->declaration.type;
4355 ir_type *el_type = get_ir_type(type->array.element_type);
4357 /* make sure size_node is calculated */
4358 get_type_size_node(type);
4359 ir_node *elems = type->array.size_node;
4360 ir_node *mem = get_store();
4361 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4363 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4364 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4367 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4368 entity->variable.v.vla_base = addr;
4372 * Creates a Firm local variable from a declaration.
4374 static void create_local_variable(entity_t *entity)
4376 assert(entity->kind == ENTITY_VARIABLE);
4377 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4379 bool needs_entity = entity->variable.address_taken;
4380 type_t *type = skip_typeref(entity->declaration.type);
4382 /* is it a variable length array? */
4383 if (is_type_array(type) && !type->array.size_constant) {
4384 create_variable_length_array(entity);
4386 } else if (is_type_array(type) || is_type_compound(type)) {
4387 needs_entity = true;
4388 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4389 needs_entity = true;
4393 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4394 create_variable_entity(entity,
4395 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4398 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4399 entity->variable.v.value_number = next_value_number_function;
4400 set_irg_loc_description(current_ir_graph, next_value_number_function,
4402 ++next_value_number_function;
4406 static void create_local_static_variable(entity_t *entity)
4408 assert(entity->kind == ENTITY_VARIABLE);
4409 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4411 type_t *type = skip_typeref(entity->declaration.type);
4412 ir_type *const var_type = entity->variable.thread_local ?
4413 get_tls_type() : get_glob_type();
4414 ir_type *const irtype = get_ir_type(type);
4415 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4417 size_t l = strlen(entity->base.symbol->string);
4418 char buf[l + sizeof(".%u")];
4419 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4420 ident *const id = id_unique(buf);
4421 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4423 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4424 set_entity_volatility(irentity, volatility_is_volatile);
4427 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4428 entity->variable.v.entity = irentity;
4430 set_entity_ld_ident(irentity, id);
4431 set_entity_visibility(irentity, ir_visibility_local);
4433 ir_graph *const old_current_ir_graph = current_ir_graph;
4434 current_ir_graph = get_const_code_irg();
4436 create_variable_initializer(entity);
4438 assert(current_ir_graph == get_const_code_irg());
4439 current_ir_graph = old_current_ir_graph;
4444 static void return_statement_to_firm(return_statement_t *statement)
4446 if (!currently_reachable())
4449 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4450 type_t *type = current_function_entity->declaration.type;
4451 ir_type *func_irtype = get_ir_type(type);
4455 if (get_method_n_ress(func_irtype) > 0) {
4456 ir_type *res_type = get_method_res_type(func_irtype, 0);
4458 if (statement->value != NULL) {
4459 ir_node *node = expression_to_firm(statement->value);
4460 if (!is_compound_type(res_type)) {
4461 type_t *ret_value_type = statement->value->base.type;
4462 ir_mode *mode = get_ir_mode_storage(ret_value_type);
4463 node = create_conv(dbgi, node, mode);
4464 node = do_strict_conv(dbgi, node);
4469 if (is_compound_type(res_type)) {
4472 mode = get_type_mode(res_type);
4474 in[0] = new_Unknown(mode);
4478 /* build return_value for its side effects */
4479 if (statement->value != NULL) {
4480 expression_to_firm(statement->value);
4485 ir_node *store = get_store();
4486 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4488 ir_node *end_block = get_irg_end_block(current_ir_graph);
4489 add_immBlock_pred(end_block, ret);
4491 set_unreachable_now();
4494 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4496 if (!currently_reachable())
4499 return expression_to_firm(statement->expression);
4502 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4504 entity_t *entity = compound->scope.entities;
4505 for ( ; entity != NULL; entity = entity->base.next) {
4506 if (!is_declaration(entity))
4509 create_local_declaration(entity);
4512 ir_node *result = NULL;
4513 statement_t *statement = compound->statements;
4514 for ( ; statement != NULL; statement = statement->base.next) {
4515 if (statement->base.next == NULL
4516 && statement->kind == STATEMENT_EXPRESSION) {
4517 result = expression_statement_to_firm(
4518 &statement->expression);
4521 statement_to_firm(statement);
4527 static void create_global_variable(entity_t *entity)
4529 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4530 ir_visibility visibility = ir_visibility_default;
4531 ir_entity *irentity;
4532 assert(entity->kind == ENTITY_VARIABLE);
4534 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4535 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4536 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4537 case STORAGE_CLASS_NONE:
4538 visibility = ir_visibility_default;
4539 /* uninitialized globals get merged in C */
4540 if (entity->variable.initializer == NULL)
4541 linkage |= IR_LINKAGE_MERGE;
4543 case STORAGE_CLASS_TYPEDEF:
4544 case STORAGE_CLASS_AUTO:
4545 case STORAGE_CLASS_REGISTER:
4546 panic("invalid storage class for global var");
4549 ir_type *var_type = get_glob_type();
4550 if (entity->variable.thread_local) {
4551 var_type = get_tls_type();
4552 /* LINKAGE_MERGE not supported by current linkers */
4553 linkage &= ~IR_LINKAGE_MERGE;
4555 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4556 irentity = entity->variable.v.entity;
4557 add_entity_linkage(irentity, linkage);
4558 set_entity_visibility(irentity, visibility);
4561 static void create_local_declaration(entity_t *entity)
4563 assert(is_declaration(entity));
4565 /* construct type */
4566 (void) get_ir_type(entity->declaration.type);
4567 if (entity->base.symbol == NULL) {
4571 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4572 case STORAGE_CLASS_STATIC:
4573 if (entity->kind == ENTITY_FUNCTION) {
4574 (void)get_function_entity(entity, NULL);
4576 create_local_static_variable(entity);
4579 case STORAGE_CLASS_EXTERN:
4580 if (entity->kind == ENTITY_FUNCTION) {
4581 assert(entity->function.statement == NULL);
4582 (void)get_function_entity(entity, NULL);
4584 create_global_variable(entity);
4585 create_variable_initializer(entity);
4588 case STORAGE_CLASS_NONE:
4589 case STORAGE_CLASS_AUTO:
4590 case STORAGE_CLASS_REGISTER:
4591 if (entity->kind == ENTITY_FUNCTION) {
4592 if (entity->function.statement != NULL) {
4593 ir_type *owner = get_irg_frame_type(current_ir_graph);
4594 (void)get_function_entity(entity, owner);
4595 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4596 enqueue_inner_function(entity);
4598 (void)get_function_entity(entity, NULL);
4601 create_local_variable(entity);
4604 case STORAGE_CLASS_TYPEDEF:
4607 panic("invalid storage class found");
4610 static void initialize_local_declaration(entity_t *entity)
4612 if (entity->base.symbol == NULL)
4615 // no need to emit code in dead blocks
4616 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4617 && !currently_reachable())
4620 switch ((declaration_kind_t) entity->declaration.kind) {
4621 case DECLARATION_KIND_LOCAL_VARIABLE:
4622 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4623 create_variable_initializer(entity);
4626 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4627 allocate_variable_length_array(entity);
4630 case DECLARATION_KIND_COMPOUND_MEMBER:
4631 case DECLARATION_KIND_GLOBAL_VARIABLE:
4632 case DECLARATION_KIND_FUNCTION:
4633 case DECLARATION_KIND_INNER_FUNCTION:
4636 case DECLARATION_KIND_PARAMETER:
4637 case DECLARATION_KIND_PARAMETER_ENTITY:
4638 panic("can't initialize parameters");
4640 case DECLARATION_KIND_UNKNOWN:
4641 panic("can't initialize unknown declaration");
4643 panic("invalid declaration kind");
4646 static void declaration_statement_to_firm(declaration_statement_t *statement)
4648 entity_t *entity = statement->declarations_begin;
4652 entity_t *const last = statement->declarations_end;
4653 for ( ;; entity = entity->base.next) {
4654 if (is_declaration(entity)) {
4655 initialize_local_declaration(entity);
4656 } else if (entity->kind == ENTITY_TYPEDEF) {
4657 /* ยง6.7.7:3 Any array size expressions associated with variable length
4658 * array declarators are evaluated each time the declaration of the
4659 * typedef name is reached in the order of execution. */
4660 type_t *const type = skip_typeref(entity->typedefe.type);
4661 if (is_type_array(type) && type->array.is_vla)
4662 get_vla_size(&type->array);
4669 static void if_statement_to_firm(if_statement_t *statement)
4671 /* Create the condition. */
4672 ir_node *true_block = NULL;
4673 ir_node *false_block = NULL;
4674 if (currently_reachable()) {
4675 true_block = new_immBlock();
4676 false_block = new_immBlock();
4677 create_condition_evaluation(statement->condition, true_block, false_block);
4678 mature_immBlock(true_block);
4681 /* Create the false statement.
4682 * Handle false before true, so if no false statement is present, then the
4683 * empty false block is reused as fallthrough block. */
4684 ir_node *fallthrough_block = NULL;
4685 if (statement->false_statement != NULL) {
4686 if (false_block != NULL) {
4687 mature_immBlock(false_block);
4689 set_cur_block(false_block);
4690 statement_to_firm(statement->false_statement);
4691 if (currently_reachable()) {
4692 fallthrough_block = new_immBlock();
4693 add_immBlock_pred(fallthrough_block, new_Jmp());
4696 fallthrough_block = false_block;
4699 /* Create the true statement. */
4700 set_cur_block(true_block);
4701 statement_to_firm(statement->true_statement);
4702 if (currently_reachable()) {
4703 if (fallthrough_block == NULL) {
4704 fallthrough_block = new_immBlock();
4706 add_immBlock_pred(fallthrough_block, new_Jmp());
4709 /* Handle the block after the if-statement. */
4710 if (fallthrough_block != NULL) {
4711 mature_immBlock(fallthrough_block);
4713 set_cur_block(fallthrough_block);
4716 /* Create a jump node which jumps into target_block, if the current block is
4718 static void jump_if_reachable(ir_node *const target_block)
4720 ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4721 add_immBlock_pred(target_block, pred);
4724 static void while_statement_to_firm(while_statement_t *statement)
4726 /* Create the header block */
4727 ir_node *const header_block = new_immBlock();
4728 jump_if_reachable(header_block);
4730 /* Create the condition. */
4731 ir_node * body_block;
4732 ir_node * false_block;
4733 expression_t *const cond = statement->condition;
4734 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4735 fold_constant_to_bool(cond)) {
4736 /* Shortcut for while (true). */
4737 body_block = header_block;
4740 keep_alive(header_block);
4741 keep_all_memory(header_block);
4743 body_block = new_immBlock();
4744 false_block = new_immBlock();
4746 set_cur_block(header_block);
4747 create_condition_evaluation(cond, body_block, false_block);
4748 mature_immBlock(body_block);
4751 ir_node *const old_continue_label = continue_label;
4752 ir_node *const old_break_label = break_label;
4753 continue_label = header_block;
4754 break_label = false_block;
4756 /* Create the loop body. */
4757 set_cur_block(body_block);
4758 statement_to_firm(statement->body);
4759 jump_if_reachable(header_block);
4761 mature_immBlock(header_block);
4762 assert(false_block == NULL || false_block == break_label);
4763 false_block = break_label;
4764 if (false_block != NULL) {
4765 mature_immBlock(false_block);
4767 set_cur_block(false_block);
4769 assert(continue_label == header_block);
4770 continue_label = old_continue_label;
4771 break_label = old_break_label;
4774 static ir_node *get_break_label(void)
4776 if (break_label == NULL) {
4777 break_label = new_immBlock();
4782 static void do_while_statement_to_firm(do_while_statement_t *statement)
4784 /* create the header block */
4785 ir_node *header_block = new_immBlock();
4788 ir_node *body_block = new_immBlock();
4789 jump_if_reachable(body_block);
4791 ir_node *old_continue_label = continue_label;
4792 ir_node *old_break_label = break_label;
4793 continue_label = header_block;
4796 set_cur_block(body_block);
4797 statement_to_firm(statement->body);
4798 ir_node *const false_block = get_break_label();
4800 assert(continue_label == header_block);
4801 continue_label = old_continue_label;
4802 break_label = old_break_label;
4804 jump_if_reachable(header_block);
4806 /* create the condition */
4807 mature_immBlock(header_block);
4808 set_cur_block(header_block);
4810 create_condition_evaluation(statement->condition, body_block, false_block);
4811 mature_immBlock(body_block);
4812 mature_immBlock(false_block);
4814 set_cur_block(false_block);
4817 static void for_statement_to_firm(for_statement_t *statement)
4819 /* create declarations */
4820 entity_t *entity = statement->scope.entities;
4821 for ( ; entity != NULL; entity = entity->base.next) {
4822 if (!is_declaration(entity))
4825 create_local_declaration(entity);
4828 if (currently_reachable()) {
4829 entity = statement->scope.entities;
4830 for ( ; entity != NULL; entity = entity->base.next) {
4831 if (!is_declaration(entity))
4834 initialize_local_declaration(entity);
4837 if (statement->initialisation != NULL) {
4838 expression_to_firm(statement->initialisation);
4842 /* Create the header block */
4843 ir_node *const header_block = new_immBlock();
4844 jump_if_reachable(header_block);
4846 /* Create the condition. */
4847 ir_node *body_block;
4848 ir_node *false_block;
4849 if (statement->condition != NULL) {
4850 body_block = new_immBlock();
4851 false_block = new_immBlock();
4853 set_cur_block(header_block);
4854 create_condition_evaluation(statement->condition, body_block, false_block);
4855 mature_immBlock(body_block);
4858 body_block = header_block;
4861 keep_alive(header_block);
4862 keep_all_memory(header_block);
4865 /* Create the step block, if necessary. */
4866 ir_node * step_block = header_block;
4867 expression_t *const step = statement->step;
4869 step_block = new_immBlock();
4872 ir_node *const old_continue_label = continue_label;
4873 ir_node *const old_break_label = break_label;
4874 continue_label = step_block;
4875 break_label = false_block;
4877 /* Create the loop body. */
4878 set_cur_block(body_block);
4879 statement_to_firm(statement->body);
4880 jump_if_reachable(step_block);
4882 /* Create the step code. */
4884 mature_immBlock(step_block);
4885 set_cur_block(step_block);
4886 expression_to_firm(step);
4887 jump_if_reachable(header_block);
4890 mature_immBlock(header_block);
4891 assert(false_block == NULL || false_block == break_label);
4892 false_block = break_label;
4893 if (false_block != NULL) {
4894 mature_immBlock(false_block);
4896 set_cur_block(false_block);
4898 assert(continue_label == step_block);
4899 continue_label = old_continue_label;
4900 break_label = old_break_label;
4903 static void create_jump_statement(const statement_t *statement,
4904 ir_node *target_block)
4906 if (!currently_reachable())
4909 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4910 ir_node *jump = new_d_Jmp(dbgi);
4911 add_immBlock_pred(target_block, jump);
4913 set_unreachable_now();
4916 static void switch_statement_to_firm(switch_statement_t *statement)
4918 ir_node *first_block = NULL;
4919 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4920 ir_node *cond = NULL;
4922 if (currently_reachable()) {
4923 ir_node *expression = expression_to_firm(statement->expression);
4924 cond = new_d_Cond(dbgi, expression);
4925 first_block = get_cur_block();
4928 set_unreachable_now();
4930 ir_node *const old_switch_cond = current_switch_cond;
4931 ir_node *const old_break_label = break_label;
4932 const bool old_saw_default_label = saw_default_label;
4933 saw_default_label = false;
4934 current_switch_cond = cond;
4936 switch_statement_t *const old_switch = current_switch;
4937 current_switch = statement;
4939 /* determine a free number for the default label */
4940 unsigned long num_cases = 0;
4941 long default_proj_nr = 0;
4942 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4943 if (l->expression == NULL) {
4947 if (l->last_case >= l->first_case)
4948 num_cases += l->last_case - l->first_case + 1;
4949 if (l->last_case > default_proj_nr)
4950 default_proj_nr = l->last_case;
4953 if (default_proj_nr == LONG_MAX) {
4954 /* Bad: an overflow will occur, we cannot be sure that the
4955 * maximum + 1 is a free number. Scan the values a second
4956 * time to find a free number.
4958 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4960 memset(bits, 0, (num_cases + 7) >> 3);
4961 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4962 if (l->expression == NULL) {
4966 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4967 if (start < num_cases && l->last_case >= 0) {
4968 unsigned long end = (unsigned long)l->last_case < num_cases ?
4969 (unsigned long)l->last_case : num_cases - 1;
4970 for (unsigned long cns = start; cns <= end; ++cns) {
4971 bits[cns >> 3] |= (1 << (cns & 7));
4975 /* We look at the first num_cases constants:
4976 * Either they are dense, so we took the last (num_cases)
4977 * one, or they are not dense, so we will find one free
4981 for (i = 0; i < num_cases; ++i)
4982 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4986 default_proj_nr = i;
4990 statement->default_proj_nr = default_proj_nr;
4991 /* safety check: cond might already be folded to a Bad */
4992 if (cond != NULL && is_Cond(cond)) {
4993 set_Cond_default_proj(cond, default_proj_nr);
4996 statement_to_firm(statement->body);
4998 jump_if_reachable(get_break_label());
5000 if (!saw_default_label && first_block != NULL) {
5001 set_cur_block(first_block);
5002 ir_node *const proj = new_d_Proj(dbgi, cond, mode_X, default_proj_nr);
5003 add_immBlock_pred(get_break_label(), proj);
5006 if (break_label != NULL) {
5007 mature_immBlock(break_label);
5009 set_cur_block(break_label);
5011 assert(current_switch_cond == cond);
5012 current_switch = old_switch;
5013 current_switch_cond = old_switch_cond;
5014 break_label = old_break_label;
5015 saw_default_label = old_saw_default_label;
5018 static void case_label_to_firm(const case_label_statement_t *statement)
5020 if (statement->is_empty_range)
5023 ir_node *block = new_immBlock();
5024 /* Fallthrough from previous case */
5025 jump_if_reachable(block);
5027 if (current_switch_cond != NULL) {
5028 set_cur_block(get_nodes_block(current_switch_cond));
5029 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5030 if (statement->expression != NULL) {
5031 long pn = statement->first_case;
5032 long end_pn = statement->last_case;
5033 assert(pn <= end_pn);
5034 /* create jumps for all cases in the given range */
5036 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5037 add_immBlock_pred(block, proj);
5038 } while (pn++ < end_pn);
5040 saw_default_label = true;
5041 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X,
5042 current_switch->default_proj_nr);
5043 add_immBlock_pred(block, proj);
5047 mature_immBlock(block);
5048 set_cur_block(block);
5050 statement_to_firm(statement->statement);
5053 static void label_to_firm(const label_statement_t *statement)
5055 ir_node *block = get_label_block(statement->label);
5056 jump_if_reachable(block);
5058 set_cur_block(block);
5060 keep_all_memory(block);
5062 statement_to_firm(statement->statement);
5065 static void goto_to_firm(const goto_statement_t *statement)
5067 if (!currently_reachable())
5070 if (statement->expression) {
5071 ir_node *irn = expression_to_firm(statement->expression);
5072 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5073 ir_node *ijmp = new_d_IJmp(dbgi, irn);
5075 set_irn_link(ijmp, ijmp_list);
5078 ir_node *block = get_label_block(statement->label);
5079 ir_node *jmp = new_Jmp();
5080 add_immBlock_pred(block, jmp);
5082 set_unreachable_now();
5085 static void asm_statement_to_firm(const asm_statement_t *statement)
5087 bool needs_memory = false;
5089 if (statement->is_volatile) {
5090 needs_memory = true;
5093 size_t n_clobbers = 0;
5094 asm_clobber_t *clobber = statement->clobbers;
5095 for ( ; clobber != NULL; clobber = clobber->next) {
5096 const char *clobber_str = clobber->clobber.begin;
5098 if (!be_is_valid_clobber(clobber_str)) {
5099 errorf(&statement->base.source_position,
5100 "invalid clobber '%s' specified", clobber->clobber);
5104 if (streq(clobber_str, "memory")) {
5105 needs_memory = true;
5109 ident *id = new_id_from_str(clobber_str);
5110 obstack_ptr_grow(&asm_obst, id);
5113 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5114 ident **clobbers = NULL;
5115 if (n_clobbers > 0) {
5116 clobbers = obstack_finish(&asm_obst);
5119 size_t n_inputs = 0;
5120 asm_argument_t *argument = statement->inputs;
5121 for ( ; argument != NULL; argument = argument->next)
5123 size_t n_outputs = 0;
5124 argument = statement->outputs;
5125 for ( ; argument != NULL; argument = argument->next)
5128 unsigned next_pos = 0;
5130 ir_node *ins[n_inputs + n_outputs + 1];
5133 ir_asm_constraint tmp_in_constraints[n_outputs];
5135 const expression_t *out_exprs[n_outputs];
5136 ir_node *out_addrs[n_outputs];
5137 size_t out_size = 0;
5139 argument = statement->outputs;
5140 for ( ; argument != NULL; argument = argument->next) {
5141 const char *constraints = argument->constraints.begin;
5142 asm_constraint_flags_t asm_flags
5143 = be_parse_asm_constraints(constraints);
5146 source_position_t const *const pos = &statement->base.source_position;
5147 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5148 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5150 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5151 errorf(pos, "some constraints in '%s' are invalid", constraints);
5154 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5155 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5160 unsigned pos = next_pos++;
5161 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5162 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5163 expression_t *expr = argument->expression;
5164 ir_node *addr = expression_to_addr(expr);
5165 /* in+output, construct an artifical same_as constraint on the
5167 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5169 ir_node *value = get_value_from_lvalue(expr, addr);
5171 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5173 ir_asm_constraint constraint;
5174 constraint.pos = pos;
5175 constraint.constraint = new_id_from_str(buf);
5176 constraint.mode = get_ir_mode_storage(expr->base.type);
5177 tmp_in_constraints[in_size] = constraint;
5178 ins[in_size] = value;
5183 out_exprs[out_size] = expr;
5184 out_addrs[out_size] = addr;
5186 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5187 /* pure memory ops need no input (but we have to make sure we
5188 * attach to the memory) */
5189 assert(! (asm_flags &
5190 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5191 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5192 needs_memory = true;
5194 /* we need to attach the address to the inputs */
5195 expression_t *expr = argument->expression;
5197 ir_asm_constraint constraint;
5198 constraint.pos = pos;
5199 constraint.constraint = new_id_from_str(constraints);
5200 constraint.mode = NULL;
5201 tmp_in_constraints[in_size] = constraint;
5203 ins[in_size] = expression_to_addr(expr);
5207 errorf(&statement->base.source_position,
5208 "only modifiers but no place set in constraints '%s'",
5213 ir_asm_constraint constraint;
5214 constraint.pos = pos;
5215 constraint.constraint = new_id_from_str(constraints);
5216 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5218 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5220 assert(obstack_object_size(&asm_obst)
5221 == out_size * sizeof(ir_asm_constraint));
5222 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5225 obstack_grow(&asm_obst, tmp_in_constraints,
5226 in_size * sizeof(tmp_in_constraints[0]));
5227 /* find and count input and output arguments */
5228 argument = statement->inputs;
5229 for ( ; argument != NULL; argument = argument->next) {
5230 const char *constraints = argument->constraints.begin;
5231 asm_constraint_flags_t asm_flags
5232 = be_parse_asm_constraints(constraints);
5234 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5235 errorf(&statement->base.source_position,
5236 "some constraints in '%s' are not supported", constraints);
5239 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5240 errorf(&statement->base.source_position,
5241 "some constraints in '%s' are invalid", constraints);
5244 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5245 errorf(&statement->base.source_position,
5246 "write flag specified for input constraints '%s'",
5252 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5253 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5254 /* we can treat this as "normal" input */
5255 input = expression_to_firm(argument->expression);
5256 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5257 /* pure memory ops need no input (but we have to make sure we
5258 * attach to the memory) */
5259 assert(! (asm_flags &
5260 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5261 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5262 needs_memory = true;
5263 input = expression_to_addr(argument->expression);
5265 errorf(&statement->base.source_position,
5266 "only modifiers but no place set in constraints '%s'",
5271 ir_asm_constraint constraint;
5272 constraint.pos = next_pos++;
5273 constraint.constraint = new_id_from_str(constraints);
5274 constraint.mode = get_irn_mode(input);
5276 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5277 ins[in_size++] = input;
5281 ir_asm_constraint constraint;
5282 constraint.pos = next_pos++;
5283 constraint.constraint = new_id_from_str("");
5284 constraint.mode = mode_M;
5286 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5287 ins[in_size++] = get_store();
5290 assert(obstack_object_size(&asm_obst)
5291 == in_size * sizeof(ir_asm_constraint));
5292 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5294 /* create asm node */
5295 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5297 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5299 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5300 out_size, output_constraints,
5301 n_clobbers, clobbers, asm_text);
5303 if (statement->is_volatile) {
5304 set_irn_pinned(node, op_pin_state_pinned);
5306 set_irn_pinned(node, op_pin_state_floats);
5309 /* create output projs & connect them */
5311 ir_node *projm = new_Proj(node, mode_M, out_size);
5316 for (i = 0; i < out_size; ++i) {
5317 const expression_t *out_expr = out_exprs[i];
5319 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5320 ir_node *proj = new_Proj(node, mode, pn);
5321 ir_node *addr = out_addrs[i];
5323 set_value_for_expression_addr(out_expr, proj, addr);
5327 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5329 statement_to_firm(statement->try_statement);
5330 source_position_t const *const pos = &statement->base.source_position;
5331 warningf(WARN_OTHER, pos, "structured exception handling ignored");
5334 static void leave_statement_to_firm(leave_statement_t *statement)
5336 errorf(&statement->base.source_position, "__leave not supported yet");
5340 * Transform a statement.
5342 static void statement_to_firm(statement_t *statement)
5345 assert(!statement->base.transformed);
5346 statement->base.transformed = true;
5349 switch (statement->kind) {
5350 case STATEMENT_ERROR:
5351 panic("error statement found");
5352 case STATEMENT_EMPTY:
5355 case STATEMENT_COMPOUND:
5356 compound_statement_to_firm(&statement->compound);
5358 case STATEMENT_RETURN:
5359 return_statement_to_firm(&statement->returns);
5361 case STATEMENT_EXPRESSION:
5362 expression_statement_to_firm(&statement->expression);
5365 if_statement_to_firm(&statement->ifs);
5367 case STATEMENT_WHILE:
5368 while_statement_to_firm(&statement->whiles);
5370 case STATEMENT_DO_WHILE:
5371 do_while_statement_to_firm(&statement->do_while);
5373 case STATEMENT_DECLARATION:
5374 declaration_statement_to_firm(&statement->declaration);
5376 case STATEMENT_BREAK:
5377 create_jump_statement(statement, get_break_label());
5379 case STATEMENT_CONTINUE:
5380 create_jump_statement(statement, continue_label);
5382 case STATEMENT_SWITCH:
5383 switch_statement_to_firm(&statement->switchs);
5385 case STATEMENT_CASE_LABEL:
5386 case_label_to_firm(&statement->case_label);
5389 for_statement_to_firm(&statement->fors);
5391 case STATEMENT_LABEL:
5392 label_to_firm(&statement->label);
5394 case STATEMENT_GOTO:
5395 goto_to_firm(&statement->gotos);
5398 asm_statement_to_firm(&statement->asms);
5400 case STATEMENT_MS_TRY:
5401 ms_try_statement_to_firm(&statement->ms_try);
5403 case STATEMENT_LEAVE:
5404 leave_statement_to_firm(&statement->leave);
5407 panic("statement not implemented");
5410 static int count_local_variables(const entity_t *entity,
5411 const entity_t *const last)
5414 entity_t const *const end = last != NULL ? last->base.next : NULL;
5415 for (; entity != end; entity = entity->base.next) {
5419 if (entity->kind == ENTITY_VARIABLE) {
5420 type = skip_typeref(entity->declaration.type);
5421 address_taken = entity->variable.address_taken;
5422 } else if (entity->kind == ENTITY_PARAMETER) {
5423 type = skip_typeref(entity->declaration.type);
5424 address_taken = entity->parameter.address_taken;
5429 if (!address_taken && is_type_scalar(type))
5435 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5437 int *const count = env;
5439 switch (stmt->kind) {
5440 case STATEMENT_DECLARATION: {
5441 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5442 *count += count_local_variables(decl_stmt->declarations_begin,
5443 decl_stmt->declarations_end);
5448 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5457 * Return the number of local (alias free) variables used by a function.
5459 static int get_function_n_local_vars(entity_t *entity)
5461 const function_t *function = &entity->function;
5464 /* count parameters */
5465 count += count_local_variables(function->parameters.entities, NULL);
5467 /* count local variables declared in body */
5468 walk_statements(function->statement, count_local_variables_in_stmt, &count);
5473 * Build Firm code for the parameters of a function.
5475 static void initialize_function_parameters(entity_t *entity)
5477 assert(entity->kind == ENTITY_FUNCTION);
5478 ir_graph *irg = current_ir_graph;
5479 ir_node *args = get_irg_args(irg);
5481 ir_type *function_irtype;
5483 if (entity->function.need_closure) {
5484 /* add an extra parameter for the static link */
5485 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5488 /* Matze: IMO this is wrong, nested functions should have an own
5489 * type and not rely on strange parameters... */
5490 function_irtype = create_method_type(&entity->declaration.type->function, true);
5492 function_irtype = get_ir_type(entity->declaration.type);
5497 entity_t *parameter = entity->function.parameters.entities;
5498 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5499 if (parameter->kind != ENTITY_PARAMETER)
5502 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5503 type_t *type = skip_typeref(parameter->declaration.type);
5505 bool needs_entity = parameter->parameter.address_taken;
5506 assert(!is_type_array(type));
5507 if (is_type_compound(type)) {
5508 needs_entity = true;
5511 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5513 ir_type *frame_type = get_irg_frame_type(irg);
5515 = new_parameter_entity(frame_type, n, param_irtype);
5516 parameter->declaration.kind
5517 = DECLARATION_KIND_PARAMETER_ENTITY;
5518 parameter->parameter.v.entity = param;
5522 ir_mode *param_mode = get_type_mode(param_irtype);
5524 ir_node *value = new_r_Proj(args, param_mode, pn);
5526 ir_mode *mode = get_ir_mode_storage(type);
5527 value = create_conv(NULL, value, mode);
5528 value = do_strict_conv(NULL, value);
5530 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5531 parameter->parameter.v.value_number = next_value_number_function;
5532 set_irg_loc_description(current_ir_graph, next_value_number_function,
5534 ++next_value_number_function;
5536 set_value(parameter->parameter.v.value_number, value);
5541 * Handle additional decl modifiers for IR-graphs
5543 * @param irg the IR-graph
5544 * @param dec_modifiers additional modifiers
5546 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5547 decl_modifiers_t decl_modifiers)
5549 if (decl_modifiers & DM_NAKED) {
5550 /* TRUE if the declaration includes the Microsoft
5551 __declspec(naked) specifier. */
5552 add_irg_additional_properties(irg, mtp_property_naked);
5554 if (decl_modifiers & DM_FORCEINLINE) {
5555 /* TRUE if the declaration includes the
5556 Microsoft __forceinline specifier. */
5557 set_irg_inline_property(irg, irg_inline_forced);
5559 if (decl_modifiers & DM_NOINLINE) {
5560 /* TRUE if the declaration includes the Microsoft
5561 __declspec(noinline) specifier. */
5562 set_irg_inline_property(irg, irg_inline_forbidden);
5566 static void add_function_pointer(ir_type *segment, ir_entity *method,
5567 const char *unique_template)
5569 ir_type *method_type = get_entity_type(method);
5570 ir_type *ptr_type = new_type_pointer(method_type);
5572 /* these entities don't really have a name but firm only allows
5574 * Note that we mustn't give these entities a name since for example
5575 * Mach-O doesn't allow them. */
5576 ident *ide = id_unique(unique_template);
5577 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5578 ir_graph *irg = get_const_code_irg();
5579 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5582 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5583 set_entity_compiler_generated(ptr, 1);
5584 set_entity_visibility(ptr, ir_visibility_private);
5585 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5586 set_atomic_ent_value(ptr, val);
5590 * Generate possible IJmp branches to a given label block.
5592 static void gen_ijmp_branches(ir_node *block)
5595 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5596 add_immBlock_pred(block, ijmp);
5601 * Create code for a function and all inner functions.
5603 * @param entity the function entity
5605 static void create_function(entity_t *entity)
5607 assert(entity->kind == ENTITY_FUNCTION);
5608 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5610 if (entity->function.statement == NULL)
5613 inner_functions = NULL;
5614 current_trampolines = NULL;
5616 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5617 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5618 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5620 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5621 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5622 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5625 current_function_entity = entity;
5626 current_function_name = NULL;
5627 current_funcsig = NULL;
5629 assert(all_labels == NULL);
5630 all_labels = NEW_ARR_F(label_t *, 0);
5633 int n_local_vars = get_function_n_local_vars(entity);
5634 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5635 current_ir_graph = irg;
5637 ir_graph *old_current_function = current_function;
5638 current_function = irg;
5640 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5641 current_vararg_entity = NULL;
5643 set_irg_fp_model(irg, firm_fp_model);
5644 tarval_enable_fp_ops(1);
5645 set_irn_dbg_info(get_irg_start_block(irg),
5646 get_entity_dbg_info(function_entity));
5648 ir_node *first_block = get_cur_block();
5650 /* set inline flags */
5651 if (entity->function.is_inline)
5652 set_irg_inline_property(irg, irg_inline_recomended);
5653 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5655 next_value_number_function = 0;
5656 initialize_function_parameters(entity);
5657 current_static_link = entity->function.static_link;
5659 statement_to_firm(entity->function.statement);
5661 ir_node *end_block = get_irg_end_block(irg);
5663 /* do we have a return statement yet? */
5664 if (currently_reachable()) {
5665 type_t *type = skip_typeref(entity->declaration.type);
5666 assert(is_type_function(type));
5667 const function_type_t *func_type = &type->function;
5668 const type_t *return_type
5669 = skip_typeref(func_type->return_type);
5672 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5673 ret = new_Return(get_store(), 0, NULL);
5676 if (is_type_scalar(return_type)) {
5677 mode = get_ir_mode_storage(func_type->return_type);
5683 /* ยง5.1.2.2.3 main implicitly returns 0 */
5684 if (is_main(entity)) {
5685 in[0] = new_Const(get_mode_null(mode));
5687 in[0] = new_Unknown(mode);
5689 ret = new_Return(get_store(), 1, in);
5691 add_immBlock_pred(end_block, ret);
5694 bool has_computed_gotos = false;
5695 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5696 label_t *label = all_labels[i];
5697 if (label->address_taken) {
5698 gen_ijmp_branches(label->block);
5699 has_computed_gotos = true;
5701 mature_immBlock(label->block);
5703 if (has_computed_gotos) {
5704 /* if we have computed goto's in the function, we cannot inline it */
5705 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5706 source_position_t const *const pos = &entity->base.source_position;
5707 warningf(WARN_OTHER, pos, "'%N' can never be inlined because it contains a computed goto", entity);
5709 set_irg_inline_property(irg, irg_inline_forbidden);
5712 DEL_ARR_F(all_labels);
5715 mature_immBlock(first_block);
5716 mature_immBlock(end_block);
5718 irg_finalize_cons(irg);
5720 /* finalize the frame type */
5721 ir_type *frame_type = get_irg_frame_type(irg);
5722 int n = get_compound_n_members(frame_type);
5725 for (int i = 0; i < n; ++i) {
5726 ir_entity *member = get_compound_member(frame_type, i);
5727 ir_type *entity_type = get_entity_type(member);
5729 int align = get_type_alignment_bytes(entity_type);
5730 if (align > align_all)
5734 misalign = offset % align;
5736 offset += align - misalign;
5740 set_entity_offset(member, offset);
5741 offset += get_type_size_bytes(entity_type);
5743 set_type_size_bytes(frame_type, offset);
5744 set_type_alignment_bytes(frame_type, align_all);
5746 irg_verify(irg, VERIFY_ENFORCE_SSA);
5747 current_vararg_entity = old_current_vararg_entity;
5748 current_function = old_current_function;
5750 if (current_trampolines != NULL) {
5751 DEL_ARR_F(current_trampolines);
5752 current_trampolines = NULL;
5755 /* create inner functions if any */
5756 entity_t **inner = inner_functions;
5757 if (inner != NULL) {
5758 ir_type *rem_outer_frame = current_outer_frame;
5759 current_outer_frame = get_irg_frame_type(current_ir_graph);
5760 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5761 create_function(inner[i]);
5765 current_outer_frame = rem_outer_frame;
5769 static void scope_to_firm(scope_t *scope)
5771 /* first pass: create declarations */
5772 entity_t *entity = scope->entities;
5773 for ( ; entity != NULL; entity = entity->base.next) {
5774 if (entity->base.symbol == NULL)
5777 if (entity->kind == ENTITY_FUNCTION) {
5778 if (entity->function.btk != BUILTIN_NONE) {
5779 /* builtins have no representation */
5782 (void)get_function_entity(entity, NULL);
5783 } else if (entity->kind == ENTITY_VARIABLE) {
5784 create_global_variable(entity);
5785 } else if (entity->kind == ENTITY_NAMESPACE) {
5786 scope_to_firm(&entity->namespacee.members);
5790 /* second pass: create code/initializers */
5791 entity = scope->entities;
5792 for ( ; entity != NULL; entity = entity->base.next) {
5793 if (entity->base.symbol == NULL)
5796 if (entity->kind == ENTITY_FUNCTION) {
5797 if (entity->function.btk != BUILTIN_NONE) {
5798 /* builtins have no representation */
5801 create_function(entity);
5802 } else if (entity->kind == ENTITY_VARIABLE) {
5803 assert(entity->declaration.kind
5804 == DECLARATION_KIND_GLOBAL_VARIABLE);
5805 current_ir_graph = get_const_code_irg();
5806 create_variable_initializer(entity);
5811 void init_ast2firm(void)
5813 obstack_init(&asm_obst);
5814 init_atomic_modes();
5816 ir_set_debug_retrieve(dbg_retrieve);
5817 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5819 /* create idents for all known runtime functions */
5820 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5821 rts_idents[i] = new_id_from_str(rts_data[i].name);
5824 entitymap_init(&entitymap);
5827 static void init_ir_types(void)
5829 static int ir_types_initialized = 0;
5830 if (ir_types_initialized)
5832 ir_types_initialized = 1;
5834 ir_type_int = get_ir_type(type_int);
5835 ir_type_char = get_ir_type(type_char);
5836 ir_type_const_char = get_ir_type(type_const_char);
5837 ir_type_wchar_t = get_ir_type(type_wchar_t);
5838 ir_type_void = get_ir_type(type_void);
5840 be_params = be_get_backend_param();
5841 mode_float_arithmetic = be_params->mode_float_arithmetic;
5843 stack_param_align = be_params->stack_param_align;
5846 void exit_ast2firm(void)
5848 entitymap_destroy(&entitymap);
5849 obstack_free(&asm_obst, NULL);
5852 static void global_asm_to_firm(statement_t *s)
5854 for (; s != NULL; s = s->base.next) {
5855 assert(s->kind == STATEMENT_ASM);
5857 char const *const text = s->asms.asm_text.begin;
5858 size_t size = s->asms.asm_text.size;
5860 /* skip the last \0 */
5861 if (text[size - 1] == '\0')
5864 ident *const id = new_id_from_chars(text, size);
5869 void translation_unit_to_firm(translation_unit_t *unit)
5871 /* initialize firm arithmetic */
5872 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5873 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5875 /* just to be sure */
5876 continue_label = NULL;
5878 current_switch_cond = NULL;
5879 current_translation_unit = unit;
5883 scope_to_firm(&unit->scope);
5884 global_asm_to_firm(unit->global_asm);
5886 current_ir_graph = NULL;
5887 current_translation_unit = NULL;